United Community Banks (UCB) 10-K 25 Feb 22 2021 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Jan. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-35095
Entity Registrant Name	UNITED COMMUNITY BANKS, INC.
Entity Central Index Key	0000857855
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	GA
Entity Tax Identification Number	58-1807304
Entity Address, Address Line One	125 Highway 515 East
Entity Address, City or Town	Blairsville
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30512
City Area Code	706
Local Phone Number	781-2265
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,760,810,229
Entity Common Stock, Shares Outstanding		105,980,634
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement for the 2022 Annual Meeting of Shareholders to be held on May 18, 2022 (the “2022 Proxy Statement”) are incorporated herein into Part III by reference.
Common stock, par value $1 per share
Entity Listings [Line Items]
Title of 12(b) Security	Common stock, par value $1 per share
Trading Symbol	UCBI
Security Exchange Name	NASDAQ
Depositary shares, each representing 1/1000th interest in a share of Series I Non-Cumulative Preferred Stock
Entity Listings [Line Items]
Title of 12(b) Security	Depositary shares, each representing 1/1000th interest in a share of Series I Non-Cumulative Preferred Stock
Trading Symbol	UCBIO
Security Exchange Name	NASDAQ

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Atlanta, Georgia
Auditor Firm ID	238

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 144,244	$ 148,896
Interest-bearing deposits in banks	2,147,266	1,459,723
Federal funds and other short-term investments	27,000	0
Cash and cash equivalents	2,318,510	1,608,619
Debt securities available-for-sale	4,496,824	3,224,721
Debt securities held-to-maturity (fair value $1,148,804 and $437,193, respectively)	1,156,098	420,361
Loans held for sale at fair value	44,109	105,433
Loans and leases held for investment	11,760,346	11,370,815
Less allowance for credit losses - loans and leases	(102,532)	(137,010)
Loans and leases, net	11,657,814	11,233,805
Premises and equipment, net	245,296	218,489
Bank owned life insurance	217,713	201,969
Accrued interest receivable	42,999	47,672
Net deferred tax asset	41,322	38,411
Derivative financial instruments	42,480	86,666
Goodwill and other intangible assets, net	472,407	381,823
Other assets	211,199	226,405
Total assets	20,946,771	17,794,374
Deposits:
Noninterest-bearing demand	6,956,981	5,390,291
Interest-bearing deposits	11,284,198	9,842,067
Total deposits	18,241,179	15,232,358
Long-term debt	247,360	326,956
Derivative financial instruments	25,145	29,003
Accrued expenses and other liabilities	210,842	198,527
Total liabilities	18,724,526	15,786,844
Commitments and contingencies
Shareholders' equity:
Preferred stock, $1 par value: 10,000,000 shares authorized; Series I, $25,000 per share liquidation preference; 4,000 shares issued and outstanding	96,422	96,422
Common stock, $1 par value; 200,000,000 and 150,000,000 shares authorized, respectively; 89,349,826 and 86,675,279 shares issued and outstanding, respectively	89,350	86,675
Common stock issuable; 595,705 and 600,834 shares, respectively	11,288	10,855
Capital surplus	1,721,007	1,638,999
Retained earnings	330,654	136,869
Accumulated other comprehensive (loss) income	(26,476)	37,710
Total shareholders’ equity	2,222,245	2,007,530
Total liabilities and shareholders’ equity	$ 20,946,771	$ 17,794,374

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
HTM debt securities	$ 1,148,804,000	$ 437,193,000
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock authorized (in shares)	10,000,000	10,000,000
Preferred stock liquidation preference (in dollars per share)	$ 25,000	$ 25,000
Preferred stock issued (in shares)	4,000	4,000
Preferred stock outstanding (in shares)	4,000	4,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock authorized (in shares)	200,000,000	150,000,000
Common stock issued (in shares)	89,349,826	86,675,279
Common stock outstanding (in shares)	89,349,826	86,675,279
Common stock issuable (in shares)	595,705	600,834

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest revenue:
Loans, including fees	$ 505,734	$ 494,212	$ 476,039
Investment securities:
Taxable	61,994	55,031	69,920
Tax exempt	8,978	7,043	4,564
Deposits in banks and short-term investments	2,088	1,710	2,183
Total interest revenue	578,794	557,996	552,706
Interest expense:
Deposits	14,845	41,772	66,856
Short-term borrowings	0	3	838
Federal Home Loan Bank advances	3	28	2,697
Long-term debt	14,912	14,434	12,921
Total interest expense	29,760	56,237	83,312
Net interest revenue	549,034	501,759	469,394
(Release of) provision for credit losses	(37,550)	80,434	13,150
Net interest revenue after provision for credit losses	586,584	421,325	456,244
Noninterest income:
Wealth management fees	18,998	9,240	6,150
Gains from other loan sales, net	11,267	5,420	6,867
Other lending and loan servicing fees	9,427	8,028	4,054
Securities gains (losses), net	83	748	(1,021)
Other	25,729	24,185	24,721
Total noninterest income	157,818	156,109	104,713
Total revenue	744,402	577,434	560,957
Noninterest expenses:
Salaries and employee benefits	241,443	224,060	196,440
Occupancy	28,619	25,791	23,350
Communications and equipment	29,829	27,149	24,613
Professional fees	20,589	18,032	17,028
Lending and loan servicing expense	10,859	10,993	9,416
Outside services - electronic banking	9,481	7,513	7,020
Postage, printing and supplies	7,110	6,779	6,370
Advertising and public relations	5,910	15,203	6,170
FDIC assessments and other regulatory charges	7,398	5,982	4,901
Amortization of intangibles	4,045	4,168	4,938
Merger-related and other charges	13,970	7,018	6,907
Other	17,386	15,301	15,092
Total noninterest expenses	396,639	367,989	322,245
Income before income taxes	347,763	209,445	238,712
Income tax expense	77,962	45,356	52,991
Net income	269,801	164,089	185,721
Net income available to common shareholders, basic	261,269	159,269	184,346
Net income available to common shareholders, diluted	$ 261,269	$ 159,269	$ 184,346
Income per common share:
Basic (in dollars per share)	$ 2.97	$ 1.91	$ 2.31
Diluted (in dollars per share)	$ 2.97	$ 1.91	$ 2.31
Weighted average common shares outstanding:
Basic (in shares)	87,940	83,184	79,700
Diluted (in shares)	88,097	83,248	79,708
Service charges and fees
Noninterest income:
Service charges and other related fees	$ 33,868	$ 32,401	$ 36,797
Mortgage loan gains and related fees
Noninterest income:
Service charges and other related fees	$ 58,446	$ 76,087	$ 27,145

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income, Before-tax Amount	$ 347,763	$ 209,445	$ 238,712
Net income, Tax (Expense) Benefit	(77,962)	(45,356)	(52,991)
Net income	269,801	164,089	185,721
Unrealized gains (losses) on available-for-sale securities:
Unrealized holding (losses) gains, Before-tax Amount	(92,231)	39,385	64,749
Unrealized holding (losses) gains, Tax (Expense) Benefit	23,294	(9,514)	(15,696)
Unrealized holding (losses) gains, Net of Tax Amount	(68,937)	29,871	49,053
Reclassification adjustment for (gains) losses recognized in net income, Before-tax Amount	(83)	(748)	1,021
Reclassification adjustment for (gains) losses recognized in net income, Tax (Expense) Benefit	(46)	191	(247)
Reclassification adjustment for (gains) losses recognized in net income, Net of Tax Amount	(129)	(557)	774
Net unrealized (losses) gains, Before-tax Amount	(92,314)	38,637	65,770
Net unrealized (losses) gains, Tax (Expense) Benefit	23,248	(9,323)	(15,943)
Net unrealized (losses) gains, Net of Tax Amount	(69,066)	29,314	49,827
Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Before-tax Amount	0	723	383
Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Tax (Expense) Benefit	0	(173)	(92)
Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Net of Tax Amount	0	550	291
Derivative instruments designated as cash flow hedges:
Amortization of losses included in net income on terminated derivative financial instruments previously accounted for as cash flow hedges, Before-tax Amount	0	0	337
Amortization of losses included in net income on terminated derivative financial instruments previously accounted for as cash flow hedges, Tax (Expense) Benefit	0	0	(86)
Amortization of losses included in net income on terminated derivative financial instruments previously accounted for as cash flow hedges, Net of Tax Amount	0	0	251
Unrealized holding gains (losses) on derivatives, Before-tax Amount	3,837	(149)	0
Unrealized holding gains (losses) on derivatives, Tax (Expense) Benefit	(979)	38	0
Unrealized holding gains (losses) on derivatives, Net of Tax Amount	2,858	(111)	0
Reclassification of losses on derivative instruments recognized in net income, Before-tax Amount	608	359	0
Reclassification of losses on derivative instruments recognized in net income, Tax (Expense) Benefit	(156)	(91)	0
Reclassification of losses on derivative instruments recognized in net income, Net of Tax Amount	452	268	0
Net cash flow hedge activity, Before-tax Amount	4,445	210	337
Net cash flow hedge activity, Tax (Expense) Benefit	(1,135)	(53)	(86)
Net cash flow hedge activity, Net of Tax Amount	3,310	157	251
Defined benefit pension plan activity:
Termination of defined benefit pension plan, Before-tax Amount	0	0	1,558
Termination of defined benefit pension plan, Tax (Expense) Benefit	0	0	(398)
Termination of defined benefit pension plan, Net of Tax Amount	0	0	1,160
Amendments to defined benefit pension plans, Before-tax Amount	0	0	(386)
Amendments to defined benefit pension plans,, Tax (Expense) Benefit	0	0	99
Amendments to defined benefit pension plans,, Net of Tax Amount	0	0	(287)
Net actuarial gain (loss) on defined benefit pension plans, Before-tax Amount	1,066	(1,804)	(2,390)
Net actuarial gain (loss) on defined benefit pension plans, Tax (Expense) Benefit	(273)	461	610
Net actuarial gain (loss) on defined benefit pension plans, Net of Tax Amount	793	(1,343)	(1,780)
Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans, Before-tax Amount	1,044	857	699
Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans, Tax (Expense) Benefit	(267)	(219)	(178)
Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans, Net of Tax Amount	777	638	521
Net defined benefit pension plan activity, Before-tax Amount	2,110	(947)	(519)
Net defined benefit pension plan activity, Tax (Expense) Benefit	(540)	242	133
Net defined benefit pension plan activity, Net of Tax Amount	1,570	(705)	(386)
Total other comprehensive (loss) income, Before-tax Amount	(85,759)	38,623	65,971
Total other comprehensive (loss) income, Tax (Expense) Benefit	21,573	(9,307)	(15,988)
Total other comprehensive (loss) income, Net of Tax Amount	(64,186)	29,316	49,983
Comprehensive income, Before-tax Amount	262,004	248,068	304,683
Comprehensive income, Tax (Expense) Benefit	(56,389)	(54,663)	(68,979)
Comprehensive income, Net of Tax Amount	$ 205,615	$ 193,405	$ 235,704

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Adoption of new accounting standard	Preferred Stock	Common Stock	Common Stock Issuable	Capital Surplus	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit)Adoption of new accounting standard	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2018	$ 1,457,554	$ (549)	$ 0	$ 79,234	$ 10,744	$ 1,499,584	$ (90,419)	$ (549)	$ (41,589)
Beginning balance (shares) at Dec. 31, 2018				79,234,077
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	185,721						185,721
Other comprehensive income (loss)	49,983								49,983
Purchases of common stock	$ (13,020)			$ (500)		(12,520)
Purchases of common stock (shares)	(500,495)			(500,495)
Common stock dividends	$ (54,601)						(54,601)
Impact of equity-based compensation awards	8,130			$ 122	1,476	6,532
Impact of equity-based compensation awards (shares)				122,100
Impact of other equity plans	2,474			$ 158	(729)	3,045
Impact of other equity plans (shares)				158,047
Ending balance at Dec. 31, 2019	1,635,692	$ (3,529)	0	$ 79,014	11,491	1,496,641	40,152	$ (3,529)	8,394
Ending balance (shares) at Dec. 31, 2019				79,013,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	164,089						164,089
Other comprehensive income (loss)	29,316								29,316
Issuance of preferred stock	96,422		96,422
Common stock issued for acquisitions	163,589			$ 8,131		155,458
Common stock issued for acquisitions (shares)				8,130,633
Purchases of common stock	$ (20,782)			$ (827)		(19,955)
Purchases of common stock (shares)	(826,482)			(826,482)
Preferred stock dividends	$ (3,533)						(3,533)
Common stock dividends	(60,310)						(60,310)
Impact of equity-based compensation awards	6,086			$ 202	1,120	4,764
Impact of equity-based compensation awards (shares)				202,437
Impact of other equity plans	490			$ 155	(1,756)	2,091
Impact of other equity plans (shares)				154,962
Ending balance at Dec. 31, 2020	2,007,530		96,422	$ 86,675	10,855	1,638,999	136,869		37,710
Ending balance (shares) at Dec. 31, 2020				86,675,279
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	269,801						269,801
Other comprehensive income (loss)	(64,186)								(64,186)
Common stock issued for acquisitions	95,525			$ 2,864		92,661
Common stock issued for acquisitions (shares)				2,863,734
Purchases of common stock	$ (15,101)			$ (493)		(14,608)
Purchases of common stock (shares)	(492,744)			(492,744)
Preferred stock dividends	$ (6,876)						(6,876)
Common stock dividends	(69,140)						(69,140)
Impact of equity-based compensation awards	3,692			$ 225	1,061	2,406
Impact of equity-based compensation awards (shares)				224,706
Impact of other equity plans	1,000			$ 79	(628)	1,549
Impact of other equity plans (shares)				78,851
Ending balance at Dec. 31, 2021	$ 2,222,245		$ 96,422	$ 89,350	$ 11,288	$ 1,721,007	$ 330,654		$ (26,476)
Ending balance (shares) at Dec. 31, 2021				89,349,826

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Common stock dividends (in dollars per share)	$ 0.78	$ 0.72	$ 0.68

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 269,801	$ 164,089	$ 185,721
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion, net	(2,063)	(8,586)	23,952
(Release of) provision for credit losses	(37,550)	80,434	13,150
Stock-based compensation	6,554	7,887	9,360
Deferred income tax expense	20,787	2,668	14,909
Securities (gains) losses, net	(83)	(748)	1,021
Gains from other loan sales, net	(11,267)	(5,420)	(6,867)
Changes in assets and liabilities:
Decrease (increase) in other assets and accrued interest receivable	53,416	(20,139)	(45,789)
Decrease in accrued expenses and other liabilities	(1,599)	(14,783)	(1,975)
Decrease (increase) in loans held for sale	61,324	(46,721)	(39,549)
Net cash provided by operating activities	359,320	158,681	153,933
Debt securities held-to-maturity:
Proceeds from maturities and calls	68,319	57,981	50,379
Purchases	(806,405)	(157,465)	(59,629)
Debt securities available-for-sale and equity securities with readily determinable fair values:
Proceeds from sales	288,986	40,625	352,106
Proceeds from maturities and calls	974,721	834,725	349,758
Purchases	(2,587,420)	(1,456,311)	(294,245)
Payments for (Proceeds from) Loans and Leases	178,234	(1,069,089)	(205,612)
Equity investments, outflows	(15,595)	(15,885)	0
Equity investments, inflows	8,481	401	0
Net cash received in (paid for) acquisitions	103,065	195,699	(19,545)
Purchases of premises and equipment	(26,483)	(18,462)	(20,944)
Proceeds from sales of premises and equipment	4,247	903	6,595
Proceeds from sale of other real estate owned	3,290	1,074	2,439
Other investing outflows	(610)	0	0
Other investing inflows	767	5,241	1,916
Net cash (used in) provided by investing activities	(1,806,403)	(1,580,563)	163,218
Financing activities:
Net increase in deposits	2,353,451	2,534,471	151,401
Proceeds from Federal Home Loan Bank advances	10,000	5,000	1,625,000
Repayment of Federal Home Loan Bank advances	(34,509)	(134,121)	(1,785,000)
Repayment of long-term debt	(80,632)	0	(55,266)
Proceeds from issuance of long-term debt, net of issuance costs	0	98,552	0
Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans	506	1,317	2,193
Proceeds from exercise of options and warrants	231	0	212
Cash paid for shares withheld to cover payroll taxes related to equity instruments	(3,182)	(3,119)	(1,686)
Repurchase of common stock	(15,101)	(20,782)	(13,020)
Proceeds from issuance of Series I preferred stock, net of issuance costs	0	96,422	0
Cash dividends on common stock	(66,914)	(58,912)	(53,044)
Cash dividends on preferred stock	(6,876)	(3,533)	0
Net cash provided by (used in) financing activities	2,156,974	2,515,295	(129,210)
Net change in cash and cash equivalents	709,891	1,093,413	187,941
Cash and cash equivalents at beginning of year	1,608,619	515,206	327,265
Cash and cash equivalents at end of year	$ 2,318,510	$ 1,608,619	$ 515,206

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies See the Glossary of Defined Terms at the beginning of this Report for terms used herein. The accounting principles followed by United and the methods of applying these principles conform with GAAP and with general practices within the banking industry. The following is a description of the significant policies. Organization and Basis of Presentation The Holding Company is a bank holding company under the BHC Act and, as of July 1, 2021, a financial holding company under the GLB Act. Financial holding company status allows for engagement in a broader range of financial activities. Prior to that the Holding Company was a bank holding company. The Holding Company’s principal business is conducted by its wholly-owned commercial bank subsidiary, United Community Bank. United is subject to regulation under the BHC Act. The consolidated financial statements include the accounts of the Holding Company, the Bank and other wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Effective July 1, 2021, the Bank moved its headquarters from Blairsville, Georgia to Greenville, South Carolina and became a South Carolina state-chartered bank subject to examination and reporting requirements of the SCBFI. Prior to that date, the Bank was a Georgia state-chartered bank subject to examination and reporting requirements of the GADBF. The Bank serves both rural and metropolitan markets in Georgia, South Carolina, North Carolina, Tennessee and Florida and provides a full range of banking services. The Bank is insured by and subject to the regulation of the FDIC. Use of Estimates In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the balance sheet and revenue and expenses for the years then ended. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change are the determination of the ACL, the valuation of acquired loans, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, the valuation of goodwill and separately identifiable intangible assets associated with mergers and acquisitions, and the valuation of deferred tax assets. Operating Segments Operating segments are components of a business about which separate financial information is available and evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assessing performance. Public companies are required to report certain financial information about operating segments in interim and annual financial statements. United’s community banking operations are divided among geographic regions and local community banks within those regions. Those regions and banks have similar economic characteristics and are therefore considered to be one operating segment. Additionally, management assessed other operating units to determine if they should be classified and reported as segments, including Mortgage, Wealth Management and Commercial Banking Solutions. Qualitatively, these business units are primarily operating in the same geographic footprint as the community banks and face many of the same customers as the community banks. While the chief operating decision maker does have some limited production information for these entities, that information is not complete since it does not include a full allocation of revenue, costs and capital from key corporate functions. The business units are currently viewed more as a product line extension of the community banks. However, management will continue to evaluate these business units for separate reporting as facts and circumstances change. Based on this analysis, United concluded that it has one operating and reportable segment. Cash and Cash Equivalents Cash equivalents include amounts due from banks, interest-bearing deposits in banks, federal funds sold, commercial paper, reverse repurchase agreements and short-term investments and are carried at cost. Federal funds are generally sold for one-day periods, interest-bearing deposits in banks are available on demand and commercial paper investments and reverse repurchase agreements mature within a period of less than 90 days. Investment Securities Debt Securities: Debt securities are classified as HTM and carried at amortized cost when management has the positive intent and ability to hold them to maturity. Debt securities are classified as AFS when they may be sold before maturity. AFS securities are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premiums or discounts. Premiums and discounts on securities are generally amortized or accreted on the level-yield method without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Premiums on callable debt securities are amortized to their earliest call date. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Transfers of securities between categories are recorded at fair value at the date of transfer. Unrealized holding gains or losses associated with transfers of securities from AFS to HTM are included in the balance of AOCI in the consolidated balance sheets. These unrealized holding gains or losses are amortized/accreted into income over the remaining life of the security as an adjustment to the yield in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent. Interest accrued but not received for a security placed on nonaccrual is reversed against interest income. United implemented CECL upon adoption of ASC 326 on January 1, 2020. The CECL framework requires an estimate of expected credit losses for the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts. The following discussion provides a description of the methodology applied to calculate the ACL under CECL. Prior to the adoption of ASC 326, management evaluated securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warranted such evaluation. ACL - HTM Debt Securities: Management measures current expected credit losses on HTM debt securities on a collective basis by major security type. The estimate of current expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management classifies the HTM portfolio into the following major security types: U.S. Treasuries, U.S. Government agencies and GSEs, state and political subdivisions, residential mortgage-backed, agency and GSEs, commercial mortgage-backed, agency and GSEs and supranational entities. Accrued interest receivable on HTM debt is excluded from the estimate of credit losses. All of the residential and commercial mortgage-backed securities held by United as HTM are issued by U.S. Government agencies and GSEs. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The state and political subdivision securities are highly rated by major rating agencies. ACL - AFS Debt Securities: For AFS debt securities in an unrealized loss position, United first assesses whether it intends to sell, or whether it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security's amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, United evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an ACL is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any amount of unrealized loss that has not been recorded through an ACL is recognized in other comprehensive income. Accrued interest receivable on AFS debt securities is excluded from the estimate of credit losses. Changes in the ACL are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the ACL when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Equity securities: Equity securities are included in other assets on the consolidated balance sheets. Those with readily determinable fair values are carried at fair value with changes in fair value recognized in net income. Those without readily determinable fair values include, among others, FHLB stock held to meet FHLB requirements related to outstanding advances and CRA equity investments, including those where the returns are primarily derived from LIHTC. FHLB stock, which totaled $9.23 million at December 31, 2021, is accounted for using the cost method of accounting. LIHTC investments are accounted for using the proportional amortization method of accounting for qualified affordable housing investments which results in the amortization being reported as a component of income tax expense. Obligations related to unfunded commitments for LIHTC investments are reported in other liabilities. Other CRA investments are accounted for using the equity method of accounting. As conditions warrant, management reviews investments for impairment and adjusts the carrying value of the investment if it is deemed to be impaired. Loans Held for Sale United has elected the fair value option for mortgage loans held for sale in order to reduce certain timing differences and match changes in fair values of the loans with changes in the fair value of derivative instruments used to economically hedge them. Loans and Leases Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts and deferred fees and costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income over the life of the loan. Equipment Financing Lease Receivables: Equipment financing lease receivables, which are classified as sales-type or direct financing leases, are recorded as the sum of the future minimum lease payments, initial deferred costs and, if applicable, estimated or contractual residual values less unearned income and security deposits. For lease receivables with a residual value, the determination of such value is derived from a variety of sources including equipment valuation services, appraisals, and publicly available market data on recent sales transactions on similar equipment. The length of time until contract termination, the cyclical nature of equipment values and the limited marketplace for re-sale of certain leased assets are important variables considered in making this determination. Interest income, which is included in loan interest revenue in the consolidated statements of income, is recognized as earned using the effective interest method. Direct fees and costs associated with the origination of leases are deferred and included as a component of equipment financing receivables. Net deferred fees or costs are recognized as an adjustment to interest income over the contractual life of the lease using the effective interest method. These lease agreements may include options to renew and for the lessee to purchase the leased equipment at the end of the lease term. United excludes sales taxes from consideration in these lease contracts. PCD Loans (CECL): In acquisitions, United may acquire loans, some of which have experienced more than insignificant credit deterioration since origination. In those cases, United will consider internal loan grades, delinquency status and other relevant factors in assessing whether purchased loans are PCD. PCD loans are recorded at their fair value at the acquisition date. An initial ACL is determined using the same methodology as other loans held for investment and recognized as an adjustment to the acquisition price of the asset; thus, the sum of the loan's purchase price and ACL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent to initial recognition, PCD loans are subject to the same interest income recognition and impairment model as non-PCD loans, with changes to the ACL recorded through provision expense. Nonaccrual Loans: The accrual of interest is generally discontinued when a loan becomes 90 days past due or when management believes, after considering economic and business conditions and collection efforts, that the principal or interest will not be collectable in the normal course of business. A loan may continue to accrue interest after 90 days if it is well collateralized and in the process of collection. Past due status is based on contractual terms of the loan. During 2020 and 2021, United granted loan payment deferrals in accordance with the CARES Act and interagency guidance for certain borrowers experiencing temporary cash flow shortages as a result of the COVID-19 pandemic. During the temporary payment deferral period, these loans are not considered past due. All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. Interest received on such loans is accounted for using the cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest payments are reflected as a reduction of the carrying amount of the loan and interest income is not recognized until the loan balance is reduced to zero. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current, there is a sustained period of repayment performance and future payments are reasonably assured. TDRs: A loan for which the terms have been modified resulting in a more than insignificant concession, and for which the borrower is experiencing financial difficulties, is generally considered to be a TDR. Modified terms that result in a TDR include one or a combination of the following: a reduction of the stated interest rate of the loan, an extension of the amortization period that would not otherwise be considered in the current market for new debt with similar risk characteristics; a restructuring of the borrower’s debt into an “A/B note structure” in which the A note would fall within the borrower’s ability to pay and the remainder would be included in the B note; a mandated bankruptcy restructuring; or interest-only payment terms greater than 90 days where the borrower is unable to amortize the loan. Collateral dependent TDRs that subsequently default or are placed on nonaccrual are charged down to the fair value of the collateral consistent with United’s policy for nonaccrual loans. In accordance with the CARES Act, United implemented loan modification programs in response to the COVID-19 pandemic in order to provide borrowers with flexibility with respect to repayment terms. These loan modifications were not considered TDRs to the extent that the borrower was impacted by the COVID-19 pandemic and was not more than 30 days past due at December 31, 2019, or in certain circumstances, at the time that the COVID-19 loan modification program was implemented, unless the loan was previously classified as a TDR. Concentration of Credit Risk: Most of United’s business activity is with customers located within the markets where it has banking operations. Therefore, United’s exposure to credit risk is significantly affected by changes in the economy within its markets. Approximately 73% of United’s loan portfolio is secured by real estate and is therefore susceptible to changes in real estate valuations. ACL- Loans United implemented CECL upon adoption of ASC 326 on January 1, 2020. The CECL framework requires an estimate of expected credit losses for the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts. The following discussion provides a description of the methodology applied to calculate the ACL under CECL. The Incurred Loss method was utilized in periods prior to 2020 and is outlined in detail in our previously filed reports on Form 10-K. The ACL is a valuation account that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the ACL when management believes the uncollectibility of a loan balance is confirmed. Accrued interest receivable is excluded from the estimate of credit losses. Management determines the ACL balance using relevant available information from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Historical credit behaviors along with model judgments provide the basis for the estimation of expected credit losses. Adjustments to modeled loss estimates may be made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as changes in economic conditions, property values, or other relevant factors. For the majority of loans and leases the ACL is calculated using a discounted cash flow methodology applied at a loan level with a one-year reasonable and supportable forecast period and a two-year straight-line reversion period. The ACL-loans is measured on a collective basis when similar risk characteristics exist. United has identified the following portfolio segments and calculates the ACL for each using a discounted cash flow methodology at the loan level, with loss rates, prepayment assumptions and curtailment assumptions driven by each loan’s collateral type: Owner occupied commercial real estate - Loans in this category are susceptible to business failure and general economic conditions. Income producing commercial real estate - Common risks for this loan category are declines in general economic conditions, declines in real estate value, declines in occupancy rates, and lack of suitable alternative use for the property. Commercial & industrial - Risks to this loan category include the inability to monitor the condition of the collateral, which often consists of inventory, accounts receivable and other non-real estate assets. Equipment and inventory obsolescence can also pose a risk. Declines in general economic conditions and other events can cause cash flows to fall to levels insufficient to service debt. Commercial construction - Risks common to commercial construction loans are cost overruns, changes in market demand for property, inadequate long-term financing arrangements and declines in real estate values. Equipment financing - Risks associated with equipment financing are similar to those described for commercial and industrial loans, including general economic conditions, as well as appropriate lien priority on equipment, equipment obsolescence and the general mobility of the collateral. Residential mortgage - Residential mortgage loans are susceptible to weakening general economic conditions, increases in unemployment rates and declining real estate values. HELOC - Risks common to home equity lines of credit are general economic conditions, including an increase in unemployment rates, and declining real estate values that reduce or eliminate the borrower’s home equity. Residential construction - Residential construction loans are susceptible to the same risks as residential mortgage loans. Changes in market demand for property lead to longer marketing times resulting in higher carrying costs and declining values. Consumer - Risks common to consumer direct loans include unemployment and changes in local economic conditions as well as the inability to monitor collateral consisting of personal property. When management determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. When the discounted cash flow method is used to determine the ACL, management adjusts the effective interest rate used to discount expected cash flows to incorporate expected prepayments. The ACL on a TDR is measured using the same method as all other loans held for investment, except that the original interest rate is used to discount the expected cash flows, not the rate specified within the restructuring. Determining the Contractual Term: Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a TDR will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by United. ACL - Off-Balance Sheet Credit Exposures Management estimates expected credit losses on commitments to extend credit over the contractual period during which United is exposed to credit risk on the underlying commitments. The ACL on off-balance sheet credit exposures is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. The ACL is calculated using the same aggregate reserve rates calculated for the funded portion of loans at the portfolio level applied to the amount of commitments expected to fund. Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed primarily using the straight line method over the estimated useful lives of the related assets. Costs incurred for maintenance and repairs are expensed as incurred. The range of estimated useful lives for buildings and improvements is 10 to 40 years, for land improvements, 10 years, and for furniture and equipment, 3 to 10 years. United periodically reviews the carrying value of premises and equipment for impairment whenever events or circumstances indicate that the carrying amount of such assets may not be fully recoverable. Foreclosed Properties (Other Real Estate Owned) Foreclosed property is initially recorded at fair value, less cost to sell. If the fair value, less cost to sell at the time of foreclosure is less than the loan balance, the deficiency is recorded as a loan charge-off against the ACL. If the fair value, less cost to sell, of the foreclosed property decreases during the holding period, a valuation allowance is established with a charge to operating expenses. When the foreclosed property is sold, a gain or loss is recognized on the sale for the difference between the sales proceeds and the carrying amount of the property. Goodwill and Other Intangible Assets Goodwill is an asset representing the future economic benefits from other assets acquired that are not individually identified and separately recognized. Goodwill is measured as the excess of the consideration transferred, net of the fair value of identifiable assets acquired and liabilities assumed at the acquisition date. Goodwill is not amortized, but instead is tested for impairment annually or more frequently if events or circumstances exist that indicate a goodwill impairment test should be performed. Other intangible assets, which are initially recorded at fair value, consist of core deposit and customer list intangibles resulting from acquisitions. Core deposit intangible assets are amortized over their estimated useful lives using the sum-of-the-years-digits method. Customer list intangibles are amortized over their estimated useful lives using the straight-line method. Management evaluates other intangible assets for impairment whenever events or changes in circumstances indicate the carrying amount of the asset may not be recoverable. Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from United, the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets and United does not maintain effective control over the transferred assets through an agreement to repurchase them before maturity. Servicing Rights United records a separate servicing asset for SBA loans, USDA loans, and residential mortgage loans when the loan is sold but servicing is retained. This asset represents the right to service the loans and receive a fee in compensation. Servicing assets are initially recorded at their fair value as a component of the sale proceeds. The fair value of the servicing assets is based on an analysis of discounted cash flows that incorporates estimates of (1) market servicing costs, (2) market-based prepayment rates, and (3) market profit margins. Servicing assets are included in other assets. United has elected to subsequently measure the servicing assets for government guaranteed loans and residential mortgage loans at fair value. The rate of prepayment of loans serviced is the most significant estimate involved in the measurement process. Estimates of prepayment rates are based on market expectations of future prepayment rates, industry trends, and other considerations. Actual prepayment rates will differ from those projected by management due to changes in a variety of economic factors, including prevailing interest rates and the availability of alternative financing sources to borrowers. If actual prepayments of the loans being serviced were to occur more quickly than projected, the carrying value of servicing assets might have to be written down through a charge to earnings in the current period. If actual prepayments of the loans being serviced were to occur more slowly than had been projected, the carrying value of servicing assets could increase, and servicing income would exceed previously projected amounts. United accounts for the servicing liabilities associated with sold equipment financing loans using the amortization method. Servicing liabilities are included in accrued expenses and other liabilities. BOLI United has purchased life insurance policies on certain key executives and members of management. United has also received life insurance policies on members of acquired bank management teams through acquisitions of other banks. BOLI is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other changes or other amounts due that are probable at settlement. Operating Leases United records a ROU asset, included in other assets, and a related lease liability, included in other liabilities, for eligible operating leases for which it is the lessee, which include leases for land, buildings, and equipment. At lease commencement, United records the ROU asset and related lease liability based on the present value of lease payments over the lease term. Absent a readily determinable interest rate in the lease agreement, United utilizes the Bank’s incremental borrowing rate for secured borrowings as the discount rate used in the present value calculation. Payments related to these leases consist primarily of base rent and, in the case of building leases, additional operating costs associated with the leased property such as common area maintenance and utilities. In most cases these operating costs vary over the term of the lease, and therefore are classified as variable lease costs, which are recognized as incurred in the consolidated statement of income. In addition, certain operating leases include costs such as property taxes and insurance, which are recognized as incurred in the consolidated statement of income. Many of United’s operating leases contain renewal options, which are included in the measurement of the ROU asset and lease liability to the extent they are reasonably certain to be exercised. United also subleases and leases certain real estate properties to third parties under operating leases. United does not recognize a lease liability or ROU asset on the consolidated balance sheet related to short-term leases with a term of less than one year. Lease payments for short-term leases are recognized as expense over the lease term. Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments such as commitments to make loans and commercial letters of credit issued to meet customer financing needs. The face amount for these items represents the exposure to loss before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded. Revenue from Contracts with Customers In addition to lending and related activities, United offers various services to customers that generate revenue, certain of which are governed by ASC Topic 606 Revenue from Contracts with Customers . United’s services that fall within the scope of this topic are presented within noninterest income and include service charges and fees, wealth management fees, and other transaction-based fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur. Fees may be fixed or, where applicable, based on a percentage of transaction size. Income Taxes DTAs and DTLs are recorded for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Future tax benefits are recognized to the extent that realization of such benefits is more likely than not. DTAs and DTLs are measured using enacted tax rates expected to apply to taxable income in the years in which the assets and liabilities are expected to be recovered or settled. The effect of a change in tax rates on DTAs and DTLs is recognized in income tax expense during the period that includes the enactment date. In the event the future tax consequences of differences between the financial reporting bases and the tax bases of assets and liabilities results in DTAs, an evaluation of the probability of being able to realize the future benefits indicated by such asset is required. A valuation allowance is provided for the portion of the DTA when it is more likely than not that some or all of the DTA will not be realized. In assessing the realizability of the DTAs, management considers the scheduled reversals of DTLs, projected future taxable earnings and prudent and feasible tax planning strate

Accounting Standards Updates an

Accounting Standards Updates and Recently Adopted Standards	12 Months Ended
	Dec. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Standards Updates and Recently Adopted Standards	Accounting Standards Updates and Recently Adopted Standards Recently Adopted Standards In August 2021, the FASB issued ASU No. 2021-06, Presentation of Financial Statements (Topic 205), Financial Services - Depository and Lending (Topic 942) and Financial Services - Investment Companies (Topic 946): August 2021 Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants . Among other things, this update eliminates redundancies for items covered elsewhere in GAAP, such as loan category presentation. United adopted this update immediately, with no material impact on the consolidated financial statements. In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements . In addition to consolidating existing disclosure guidance into a single codification section to reduce the likelihood of a required disclosure being missed, this update clarifies the application of select guidance in cases where the original guidance may have been unclear. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In October 2020, the FASB issued ASU No. 2020-08, Codification Improvements to Subtopic 310-20, Receivables—Nonrefundable Fees and Other Costs . This update clarifies that an entity should reevaluate whether a callable debt security meets the criteria to adjust the amortization period of any related premium at each reporting period. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In January 2020, the FASB issued ASU No. 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 (a consensus of the Emerging Issues Task Force) . This update clarifies whether an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative and how to account for certain forward contracts and purchased options to purchase securities. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes . This update removes several exceptions related to intraperiod tax allocation when there is a loss from continuing operations and income from other items, foreign subsidiaries becoming equity method investments and vice versa, and calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The guidance also amends requirements related to franchise tax that is partially based on income, a step up in the tax basis of goodwill, allocation of consolidated tax expense to a legal entity not subject to tax in its separate financial statements, the effects of enacted changes in tax laws and other minor codification improvements regarding employee stock ownership plans and investments in qualified affordable housing projects. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans . The update removes disclosures that are no longer considered cost beneficial, clarifies specific requirements of disclosures, and adds disclosure requirements identified as relevant. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. Accounting Standards Updates Not Yet Adopted as of December 31, 2021 In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from contracts with Customers . The update requires that an acquiring entity apply the guidance from Revenue from Contracts with Customers (Topic 606) to recognize and measure contract assets and contract liabilities in a business combination, rather than fair value. For public entities, this guidance is effective for fiscal years beginning after December 15, 2022, with early adoption permitted, and requires prospective application. United does not expect the new guidance to have a material impact on the consolidated financial statements. In July 2021, the FASB issued ASU No. 2021-05, Leases (Topic 842): Lessors - Certain Leases with Variable Lease Payments . The update amends the lease classification requirements for lessors to align them with practice under the former lease accounting standard. Specifically, lessors should classify a lease with variable lease payments that do not depend on a reference index or rate as an operating lease if certain criteria are met. Adoption of this update as of January 1, 2022 did not have a material impact on the consolidated financial statements.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisitions	Acquisitions The following note details acquisitions accounted for as business combinations during the periods covered by this Report. Accordingly, assets acquired and liabilities assumed are presented at fair value as of the acquisition date. The determination of fair value requires management to make estimates about discount rates, future expected cash flows, market conditions and other future events that are highly subjective in nature and subject to change. Goodwill is established when the fair value of consideration paid exceeds the fair value of the identifiable assets acquired and liabilities assumed. Fair values are considered preliminary for a period not to exceed one year after the acquisition date and are subject to refinement as information relative to closing date fair values becomes available. FinTrust On July 6, 2021, United completed the acquisition of FinTrust, an investment advisory firm headquartered in Greenville, South Carolina, with additional locations in Anderson, South Carolina, and Athens and Macon, Georgia. The firm provides wealth and investment management services to individuals and institutions within its markets. United’s operating results for the year ended December 31, 2021 include FinTrust’s operating results for the period subsequent to the acquisition date. FinTrust shareholders received $21.7 million in total consideration, which consisted of $4.40 million (132,299 shares) of United common stock, $9.62 million in cash paid at closing, $4.40 million in cash payable due on the first anniversary of the acquisition date and $3.30 million of contingent consideration. The contingent consideration represents an earn-out payment due to the sellers of FinTrust on the second anniversary of the acquisition date. The earn-out payment is subject to the achievement of defined target revenue ratios during the two-year period following the acquisition date, which are expected to be fully achieved. At acquisition, United recognized $22.8 million of assets and $1.10 million of liabilities. Assets recorded as a result of the acquisition included goodwill of $14.2 million and a customer relationship intangible of $7.53 million. Goodwill reflects the value of FinTrust’s broad array of products and services, which enhances United’s existing wealth management business. Goodwill is expected to be deductible for tax purposes. United is amortizing the related customer relationship intangible using the straight-line method over 15 years, which represents the expected useful life of the asset. In addition, United recognized right-of-use assets and operating lease liabilities totaling $822,000 for FinTrust’s leased locations. Aquesta On October 1, 2021, United completed the acquisition of Aquesta, a bank headquartered in Cornelius, North Carolina, which operated a network of branches primarily located in the Charlotte metropolitan area. United’s operating results for the year ended December 31, 2021 include the operating results of the acquired business for the period subsequent to the acquisition date of October 1, 2021. The following table presents purchased assets and assumed liabilities recorded at their acquisition date fair values and consideration transferred as well as supplementary information related to the acquired loan portfolio at the acquisition date (in thousands) . Aquesta Fair Value Recorded by United October 1, 2021 Assets Cash and cash equivalents $ 153,091 Debt securities 60,762 Loans 498,312 Premises and equipment 18,112 BOLI 12,540 Accrued interest receivable 1,419 Net deferred tax asset 2,129 Core deposit intangible 2,030 Other assets 7,553 Total assets acquired 755,948 Liabilities Deposits 657,724 FHLB advances 24,509 Other liabilities 12,084 Total liabilities assumed 694,317 Total identifiable net assets 61,631 Consideration transferred Cash 40,542 Common stock issued (2,731,435 shares) 89,646 Option and warrant equity instruments converted 1,478 Total fair value of consideration transferred 131,666 Goodwill $ 70,035 Supplementary Information on Acquired Loans October 1, 2021 PCD loans: Par Value $ 75,579 ACL at acquisition (3,544) Non-credit discount (692) Purchase price $ 71,343 Non-PCD loans: Fair value $ 426,969 Gross contractual amounts receivable 482,737 Estimate of contractual cash flows not expected to be collected 3,399 Goodwill represents the intangible value of Aquesta’s business and reputation within the markets it served and is not expected to be deductible for income tax purposes. The Aquesta core deposit intangible will be amortized over its expected useful life of 10 years using the sum-of-the-years-digits method. Three Shores On July 1, 2020, United completed the acquisition of Three Shores, including its wholly-owned subsidiary, Seaside, headquartered in Orlando, Florida. Seaside operated a 14-branch network located in key Florida metropolitan markets. The following table presents purchased assets and assumed liabilities recorded at their acquisition date fair values and consideration transferred as well as supplementary information related to the acquired loan portfolio at the acquisition date (in thousands) Three Shores Fair Value Recorded by United July 1, 2020 Assets Cash and cash equivalents $ 219,807 Debt securities 381,740 Loans 1,427,966 Premises and equipment 1,584 Accrued interest receivable 7,681 Derivative assets 11,800 Net deferred tax asset 15,061 Core deposit intangible 3,360 Other assets 65,340 Total assets acquired 2,134,339 Liabilities Deposits 1,802,694 FHLB advances and long-term debt 144,121 Derivative liabilities 12,165 Other liabilities 28,046 Total liabilities assumed 1,987,026 Total identifiable net assets 147,313 Consideration transferred Cash 24,108 Common stock issued (8,130,633 shares) 163,589 Total fair value of consideration transferred 187,697 Goodwill $ 40,384 Supplementary Information on Acquired Loans July 1, 2020 PCD loans: Par Value $ 283,137 ACL at acquisition (11,152) Non-credit discount (8,694) Purchase price $ 263,291 Non-PCD loans: Fair value $ 1,164,675 Gross contractual amounts receivable 1,358,793 Estimate of contractual cash flows not expected to be collected 76,503 Goodwill represents the intangible value of Three Shores’ business and reputation within the markets it served and is not expected to be deductible for income tax purposes. The Three Shores core deposit intangible will be amortized over its expected useful life of 10 years using the sum-of-the-years-digits method. During the fourth quarter of 2020, within the one-year measurement period, United received additional information regarding acquisition date money market fund balances held by third party investment brokers and accrued interest receivable on certain debt securities and loans. As a result, the provisional fair values assigned to acquired cash and cash equivalents and accrued interest receivable increased by $1.09 million and $116,000, respectively. As a result of these adjustments, goodwill was reduced by $1.21 million. These adjustments are reflected in the fair values presented in the table above. Pro forma information - unaudited The following table discloses the impact of the mergers with Aquesta, FinTrust, Three Shores and the 2019 acquisition of FMBT since the respective acquisition dates through December 31 of the year of acquisition. The table also presents certain pro forma information as if Aquesta and FinTrust had been acquired on January 1, 2020, Three Shores had been acquired January 1, 2019 and FMBT had been acquired on January 1, 2018. These results combine the historical results of the acquired entities with United’s consolidated statements of income and, while adjustments were made for the estimated impact of certain fair value adjustments and other acquisition-related activity, they are not necessarily indicative of what would have occurred had the acquisitions taken place in earlier years. For purposes of pro forma information, merger-related costs incurred in the year of acquisition are excluded from the actual acquisition year results and included in the pro forma acquisition year results. As a result, merger-related costs related to the acquisitions of Aquesta and FinTrust of $9.00 million and $518,000, respectively, are reflected in 2020 pro forma information and merger-related costs related to the acquisition of Three Shores of $5.04 million are reflected in 2019 pro forma information. Merger-related costs related to the acquisition of FMBT of $2.02 million were previously reported in 2018 pro forma information, which is not presented in the following table. The following table presents the actual results and pro forma information for the periods indicated (in thousands) . (Unaudited) Year Ended December 31, Revenue Net Income 2021 Actual Aquesta results included in statement of income since acquisition date $ 2,122 $ (282) Actual FinTrust results included in statement of income since acquisition date 4,326 (26) Supplemental consolidated pro forma as if Aquesta and FinTrust had been acquired January 1, 2020 771,289 279,568 2020 Actual Three Shores results included in statement of income since acquisition date $ 24,541 $ 6,800 Supplemental consolidated pro forma as if Aquesta and FinTrust had been acquired January 1, 2020 and Three Shores had been acquired January 1, 2019 622,848 164,284 2019 Actual FMBT results included in statement of income since acquisition date $ 7,525 $ 4,053 Supplemental consolidated pro forma as if Three Shores had been acquired on January 1, 2019 and FMBT had been acquired January 1, 2018 636,079 210,232

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information The supplemental schedule of cash and noncash activities for the periods indicated is as follows (in thousands) . 2021 2020 2019 Cash paid during the period for: Interest $ 32,000 $ 59,967 $ 85,973 Income taxes paid 55,754 36,536 33,776 Significant non-cash investing and financing transactions: Transfers of loans to foreclosed properties 1,849 822 1,173 Unsettled sales of government guaranteed loans — — 8,194 Acquisitions: Assets acquired 848,806 2,174,723 264,937 Liabilities assumed 695,420 1,987,026 212,844 Net assets acquired 153,386 187,697 52,093 Value of common stock issued 94,046 163,589 — Other non-cash consideration (1) 9,178 — — (1) See Note 3, Acquisitions, for further detail.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities At December 31, 2021 and 2020, securities with a carrying value of $1.46 billion and $1.11 billion, respectively, were pledged primarily to secure deposits. The cost basis, unrealized gains and losses, and fair value of HTM debt securities as of the dates indicated are as follows (in thousands) : Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value As of December 31, 2021 U.S. Treasuries $ 19,803 $ 20 $ — $ 19,823 U.S. Government agencies & GSEs 70,180 — 1,121 69,059 State and political subdivisions 257,688 4,341 4,080 257,949 Residential MBS, Agency & GSE 381,641 2,021 3,687 379,975 Commercial MBS, Agency & GSE 411,786 4,106 8,915 406,977 Supranational entities 15,000 21 — 15,021 Total $ 1,156,098 $ 10,509 $ 17,803 $ 1,148,804 As of December 31, 2020 U.S. Government agencies & GSEs $ 10,575 $ 26 $ 11 $ 10,590 State and political subdivisions 197,723 7,658 242 205,139 Residential MBS, Agency & GSE 113,400 4,774 1 118,173 Commercial MBS, Agency & GSE 98,663 4,874 246 103,291 Total $ 420,361 $ 17,332 $ 500 $ 437,193 The cost basis, unrealized gains and losses, and fair value of AFS debt securities as of the dates indicated are as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value As of December 31, 2021 U.S. Treasuries $ 218,027 $ 1,661 $ 2,168 $ 217,520 U.S. Government agencies & GSEs 189,855 605 3,428 187,032 State and political subdivisions 263,269 15,237 2,662 275,844 Residential MBS, Agency & GSE 2,079,700 9,785 28,521 2,060,964 Residential MBS, Non-agency 81,925 2,249 4 84,170 Commercial MBS, Agency & GSE 870,563 2,974 16,156 857,381 Commercial MBS, Non-agency 15,202 1,268 — 16,470 Corporate bonds 194,164 814 1,812 193,166 Asset-backed securities 603,824 2,000 1,547 604,277 Total $ 4,516,529 $ 36,593 $ 56,298 $ 4,496,824 As of December 31, 2020 U.S. Treasuries $ 123,677 $ 4,395 $ — $ 128,072 U.S. Government agencies & GSEs 152,596 701 325 152,972 State and political subdivisions 253,630 20,891 49 274,472 Residential MBS, Agency & GSE 1,275,551 29,107 766 1,303,892 Residential MBS, Non-agency 174,322 7,499 128 181,693 Commercial MBS, Agency & GSE 524,852 8,013 597 532,268 Commercial MBS, Non-agency 15,350 1,513 — 16,863 Corporate bonds 70,057 1,711 1 71,767 Asset-backed securities 562,076 1,278 632 562,722 Total $ 3,152,111 $ 75,108 $ 2,498 $ 3,224,721 At year-end 2021 and 2020, there were no holdings of debt obligations of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of shareholders’ equity. The following summarizes HTM debt securities in an unrealized loss position as of the dates indicated (in thousands) : Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized As of December 31, 2021 U.S. Government agencies & GSEs $ 64,658 $ 888 $ 4,401 $ 233 $ 69,059 $ 1,121 State and political subdivisions 131,128 3,590 9,006 490 140,134 4,080 Residential MBS, Agency & GSE 289,132 3,687 — — 289,132 3,687 Commercial MBS, Agency & GSE 314,049 8,540 10,384 375 324,433 8,915 Total unrealized loss position $ 798,967 $ 16,705 $ 23,791 $ 1,098 $ 822,758 $ 17,803 As of December 31, 2020 U.S. Government agencies & GSEs $ 4,677 $ 11 $ — $ — $ 4,677 $ 11 State and political subdivisions 14,870 242 — — 14,870 242 Residential MBS, Agency & GSE 999 1 — — 999 1 Commercial MBS, Agency & GSE 24,956 236 1,352 10 26,308 246 Total unrealized loss position $ 45,502 $ 490 $ 1,352 $ 10 $ 46,854 $ 500 The following summarizes AFS debt securities in an unrealized loss position as of the dates indicated (in thousands) : Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized As of December 31, 2021 U.S. Treasuries $ 111,606 $ 2,168 $ — $ — $ 111,606 $ 2,168 U.S. Government agencies & GSEs 132,893 2,591 20,093 837 152,986 3,428 State and political subdivisions 69,302 2,581 3,148 81 72,450 2,662 Residential MBS, Agency & GSE 1,534,744 25,799 74,481 2,722 1,609,225 28,521 Residential MBS, Non-agency 12,608 4 — — 12,608 4 Commercial MBS, Agency & GSE 582,235 13,098 66,014 3,058 648,249 16,156 Corporate bonds 149,246 1,811 16 1 149,262 1,812 Asset-backed securities 195,164 1,546 571 1 195,735 1,547 Total unrealized loss position $ 2,787,798 $ 49,598 $ 164,323 $ 6,700 $ 2,952,121 $ 56,298 As of December 31, 2020 U.S. Government agencies & GSEs $ 27,952 $ 324 $ 607 $ 1 $ 28,559 $ 325 State and political subdivisions 9,402 49 — — 9,402 49 Residential MBS, Agency & GSE 232,199 766 — — 232,199 766 Residential MBS, Non-agency 2,331 128 — — 2,331 128 Commercial MBS, Agency & GSE 89,918 597 — — 89,918 597 Corporate bonds 1,410 1 — — 1,410 1 Asset-backed securities 87,305 28 53,587 604 140,892 632 Total unrealized loss position $ 450,517 $ 1,893 $ 54,194 $ 605 $ 504,711 $ 2,498 At December 31, 2021, there were 408 AFS debt securities and 94 HTM debt securities that were in an unrealized loss position. Management does not intend to sell nor believes it will be required to sell securities in an unrealized loss position prior to the recovery of its amortized cost basis. Unrealized losses at December 31, 2021 and 2020 were primarily attributable to changes in interest rates. At December 31, 2021 and 2020, calculated credit losses and, thus, the related ACL on HTM debt securities were de minimis due to the high credit quality of the portfolio, which included securities issued or guaranteed by the U.S. Treasury, U.S. Government agencies, GSEs, high credit quality municipalities and supranational entities. As a result, no ACL was recorded on the HTM portfolio at December 31, 2021 and 2020. In addition, based on the assessment performed as of December 31, 2021 and 2020, there was no ACL required related to the AFS portfolio. See Note 1 for additional details on the ACL as it relates to the securities portfolio. The following table presents accrued interest receivable for the periods indicated on HTM and AFS debt securities (in thousands) , which was excluded from the estimate of credit losses. Accrued Interest Receivable December 31, 2021 December 31, 2020 HTM $ 3,596 $ 1,784 AFS 9,868 9,114 Realized gains and losses are derived using the specific identification method for determining the cost of the securities sold. The following summarizes securities sales activities for the years ended December 31 (in thousands) : 2021 2020 2019 Proceeds from sales $ 288,986 $ 40,625 $ 352,106 Gross gains on sales $ 2,346 $ 748 $ 1,843 Gross losses on sales (2,263) — (2,864) Net gains (losses) on sales of securities $ 83 $ 748 $ (1,021) Income tax expense (benefit) attributable to sales $ (46) $ 191 $ (247) The amortized cost and fair value of AFS and HTM debt securities at December 31, 2021, by contractual maturity, are presented in the following table (in thousands). Expected maturities may differ from contractual maturities because issuers and borrowers may have the right to call or prepay obligations. AFS HTM Amortized Cost Fair Value Amortized Cost Fair Value Within 1 year: U.S. Treasuries $ 54,974 $ 55,418 $ — $ — U.S. Government agencies & GSEs 87 87 — — State and political subdivisions 15,008 15,247 5,200 5,324 Corporate bonds 2,657 2,657 — — 72,726 73,409 5,200 5,324 1 to 5 years: U.S. Treasuries 74,101 74,800 — — U.S. Government agencies & GSEs 22,946 22,798 — — State and political subdivisions 33,290 34,711 8,762 9,548 Corporate bonds 100,553 99,958 — — 230,890 232,267 8,762 9,548 5 to 10 years: U.S. Treasuries 88,952 $ 87,302 $ 19,803 $ 19,823 U.S. Government agencies & GSEs 79,812 77,606 31,962 31,578 State and political subdivisions 135,265 140,348 38,188 38,784 Corporate bonds 90,169 89,657 — — Supranational entities — — 15,000 15,021 394,198 394,913 104,953 105,206 More than 10 years: U.S. Government agencies & GSEs 87,010 86,541 38,218 37,481 State and political subdivisions 79,706 85,538 205,538 204,293 Corporate bonds 785 894 — — 167,501 172,973 243,756 241,774 Debt securities not due at a single maturity: Asset-backed securities 603,824 604,277 — — Residential MBS 2,161,625 2,145,134 381,641 379,975 Commercial MBS 885,765 873,851 411,786 406,977 Total $ 4,516,529 $ 4,496,824 $ 1,156,098 $ 1,148,804

Loans and Leases and Allowance

Loans and Leases and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Loans and Leases and Allowance for Credit Losses	Loans and Leases and Allowance for Credit Losses Major classifications of the loan and lease portfolio (collectively referred to as the “loan portfolio” or “loans”) are summarized as of the dates indicated as follows (in thousands) : December 31, 2021 2020 Owner occupied commercial real estate $ 2,321,685 $ 2,090,443 Income producing commercial real estate 2,600,858 2,540,750 Commercial & industrial (1) 1,910,162 2,498,560 Commercial construction 1,014,830 967,305 Equipment financing 1,083,021 863,830 Total commercial 8,930,556 8,960,888 Residential mortgage 1,637,885 1,284,920 HELOC 694,034 697,117 Residential construction 359,815 281,430 Consumer 138,056 146,460 Total loans 11,760,346 11,370,815 Less ACL - loans (102,532) (137,010) Loans, net $ 11,657,814 $ 11,233,805 (1) Commercial and industrial loans as of December 31, 2021 and 2020 included $88.3 million and $646 million of PPP loans, respectively. At December 31, 2021 and 2020, $1.01 million and $2.18 million, respectively, in overdrawn deposit accounts were reclassified as consumer loans. Accrued interest receivable related to loans totaled $28.5 million and $35.5 million at December 31, 2021 and 2020, respectively, and was reported in accrued interest receivable on the consolidated balance sheets. At December 31, 2021, the loan portfolio was subject to blanket pledges on certain qualifying loan types with the FHLB to secure contingent funding sources. The following table presents loans held for investment that were sold in the periods presented (in thousands). The gains and losses on these loan sales were included in noninterest income on the consolidated statements of income. Loans Sold 2021 2020 2019 Guaranteed portion of SBA/USDA loans $ 90,903 $ 48,385 $ 81,158 Equipment financing receivables 59,097 27,018 30,952 Indirect auto loans — — 102,789 Total $ 150,000 $ 75,403 $ 214,899 At December 31, 2021 and 2020, equipment financing assets included leases of $37.7 million and $36.8 million, respectively. The components of the net investment in leases, which included both sales-type and direct financing, are presented below (in thousands) . December 31, 2021 2020 Minimum future lease payments receivable $ 39,962 $ 38,934 Estimated residual value of leased equipment 3,216 3,263 Initial direct costs 669 672 Security deposits (687) (727) Purchase accounting premium — 117 Unearned income (5,432) (5,457) Net investment in leases $ 37,728 $ 36,802 Minimum future lease payments expected to be received from equipment financing lease contracts as of December 31, 2021 were as follows (in thousands) : Year 2022 $ 15,667 2023 11,601 2024 7,100 2025 4,136 2026 1,369 Thereafter 89 Total $ 39,962 Nonaccrual and Past Due Loans The following table presents the amortized cost basis in loans by aging category and accrual status as of December 31, 2021 and 2020 (in thousands). Loans with active COVID-19 deferrals are not reported as past due to the extent they are in compliance with the deferral terms. Accruing Loans Past Due Current Loans 30 - 59 Days 60 - 89 Days > 90 Days Nonaccrual Loans Total Loans As of December 31, 2021 Owner occupied commercial real estate $ 2,318,944 $ 27 $ — $ — $ 2,714 $ 2,321,685 Income producing commercial real estate 2,593,124 146 — — 7,588 2,600,858 Commercial & industrial 1,903,730 584 419 — 5,429 1,910,162 Commercial construction 1,014,211 — 276 — 343 1,014,830 Equipment financing 1,079,180 1,415 685 — 1,741 1,083,021 Total commercial 8,909,189 2,172 1,380 — 17,815 8,930,556 Residential mortgage 1,622,754 1,583 235 — 13,313 1,637,885 HELOC 691,814 920 88 — 1,212 694,034 Residential construction 358,741 654 — — 420 359,815 Consumer 137,564 421 19 — 52 138,056 Total loans $ 11,720,062 $ 5,750 $ 1,722 $ — $ 32,812 $ 11,760,346 As of December 31, 2020 Owner occupied commercial real estate $ 2,079,845 $ 2,013 $ 3 $ — $ 8,582 $ 2,090,443 Income producing commercial real estate 2,522,743 1,608 1,250 — 15,149 2,540,750 Commercial & industrial 2,480,483 1,176 267 — 16,634 2,498,560 Commercial construction 964,947 231 382 — 1,745 967,305 Equipment financing 856,985 2,431 1,009 — 3,405 863,830 Total commercial 8,905,003 7,459 2,911 — 45,515 8,960,888 Residential mortgage 1,265,019 5,549 1,494 — 12,858 1,284,920 HELOC 692,504 1,942 184 — 2,487 697,117 Residential construction 280,551 365 — — 514 281,430 Consumer 145,770 429 36 — 225 146,460 Total loans $ 11,288,847 $ 15,744 $ 4,625 $ — $ 61,599 $ 11,370,815 The following table presents nonaccrual loans by loan class for the periods indicated (in thousands) . Nonaccrual loans December 31, 2021 December 31, 2020 With no allowance With an allowance Total With no allowance With an allowance Total Owner occupied commercial real estate $ 2,141 $ 573 $ 2,714 $ 6,614 $ 1,968 $ 8,582 Income producing commercial real estate 6,873 715 7,588 10,008 5,141 15,149 Commercial & industrial 3,715 1,714 5,429 2,004 14,630 16,634 Commercial construction — 343 343 1,339 406 1,745 Equipment financing — 1,741 1,741 156 3,249 3,405 Total commercial 12,729 5,086 17,815 20,121 25,394 45,515 Residential mortgage 3,126 10,187 13,313 1,855 11,003 12,858 HELOC 219 993 1,212 1,329 1,158 2,487 Residential construction 280 140 420 274 240 514 Consumer 6 46 52 181 44 225 Total $ 16,360 $ 16,452 $ 32,812 $ 23,760 $ 37,839 $ 61,599 Risk Ratings United categorizes commercial loans, with the exception of equipment financing receivables, into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current industry and economic trends, among other factors. United analyzes loans individually by classifying the loans as to credit risk. This analysis is performed on a continual basis. United uses the following definitions for its risk ratings: Pass. Loans in this category are considered to have a low probability of default and do not meet the criteria of the risk categories below. Special Mention . Loans in this category are presently protected from apparent loss, however weaknesses exist that could cause future impairment, including the deterioration of financial ratios, past due status and questionable management capabilities. These loans require more than the ordinary amount of supervision. Collateral values generally afford adequate coverage, but may not be immediately marketable. Substandard. These loans are inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged. Specific and well-defined weaknesses exist that may include poor liquidity and deterioration of financial ratios. The loan may be past due and related deposit accounts experiencing overdrafts. There is the distinct possibility that United will sustain some loss if deficiencies are not corrected. If possible, immediate corrective action is taken. Doubtful. Specific weaknesses characterized as Substandard that are severe enough to make collection in full highly questionable and improbable. There is no reliable secondary source of full repayment. Loss. Loans categorized as Loss have the same characteristics as Doubtful; however probability of loss is certain. Loans classified as Loss are charged off. Equipment Financing Receivables and Consumer Purpose Loans . United applies a pass / fail grading system to all equipment financing receivables and consumer purpose loans. Under this system, loans that are on nonaccrual status, become past due 90 days or are in bankruptcy are classified as “fail” and all other loans are classified as “pass”. For reporting purposes, loans classified as “fail” are reported as “substandard” and all other loans are reported as “pass”. The following tables present the risk category of term loans by vintage year, which is the year of origination or most recent renewal, as of the date indicated (in thousands). Term Loans Revolvers Revolvers converted to term loans Total As of December 31, 2021 2021 2020 2019 2018 2017 Prior Pass Owner occupied commercial real estate $ 643,151 $ 674,124 $ 278,702 $ 153,233 $ 139,584 $ 267,460 $ 68,354 $ 17,150 $ 2,241,758 Income producing commercial real estate 668,322 678,487 333,911 221,218 165,563 219,459 41,157 11,830 2,339,947 Commercial & industrial 638,567 270,150 178,944 136,281 50,567 72,904 514,750 4,361 1,866,524 Commercial construction 378,695 303,154 149,740 40,625 22,983 13,206 12,628 1,673 922,704 Equipment financing 563,618 271,913 167,904 63,254 13,145 903 — — 1,080,737 Total commercial 2,892,353 2,197,828 1,109,201 614,611 391,842 573,932 636,889 35,014 8,451,670 Residential mortgage 781,007 370,092 108,091 64,346 71,552 221,131 9 3,915 1,620,143 HELOC — — — — — — 676,545 14,994 691,539 Residential construction 325,111 16,301 2,802 2,278 3,144 9,352 — 33 359,021 Consumer 57,530 29,218 10,757 5,137 1,439 1,355 32,312 111 137,859 4,056,001 2,613,439 1,230,851 686,372 467,977 805,770 1,345,755 54,067 11,260,232 Special Mention Owner occupied commercial real estate 7,772 2,979 16,639 4,374 6,007 2,641 248 286 40,946 Income producing commercial real estate 64,139 27,875 21,875 22,292 18,415 21,880 — — 176,476 Commercial & industrial 1,037 1,831 2,740 597 273 303 2,242 — 9,023 Commercial construction 14,283 16,237 13,149 22,479 11,766 52 — — 77,966 Equipment financing — — — — — — — — — Total commercial 87,231 48,922 54,403 49,742 36,461 24,876 2,490 286 304,411 Residential mortgage — — — — — — — — — HELOC — — — — — — — — — Residential construction — — — — — — — — — Consumer — — — — — — — — — 87,231 48,922 54,403 49,742 36,461 24,876 2,490 286 304,411 Substandard Owner occupied commercial real estate 11,987 1,049 4,216 3,712 5,829 11,088 — 1,100 38,981 Income producing commercial real estate 15,485 12,618 3,779 29,212 6,726 16,531 — 84 84,435 Commercial & industrial 2,741 1,615 5,284 12,685 1,232 5,863 4,326 869 34,615 Commercial construction 3,464 157 272 11 9,750 255 — 251 14,160 Equipment financing 428 590 676 503 84 3 — — 2,284 Total commercial 34,105 16,029 14,227 46,123 23,621 33,740 4,326 2,304 174,475 Residential mortgage 3,339 1,585 2,813 3,229 1,205 4,744 — 827 17,742 HELOC — — — — — — 329 2,166 2,495 Residential construction 407 — 30 51 — 306 — — 794 Consumer 37 16 22 26 22 50 3 21 197 37,888 17,630 17,092 49,429 24,848 38,840 4,658 5,318 195,703 Total $ 4,181,120 $ 2,679,991 $ 1,302,346 $ 785,543 $ 529,286 $ 869,486 $ 1,352,903 $ 59,671 $ 11,760,346 Term Loans Revolvers Revolvers converted to term loans Total As of December 31, 2020 2020 2019 2018 2017 2016 Prior Pass Owner occupied commercial real estate $ 707,501 $ 368,615 $ 231,316 $ 197,778 $ 201,362 $ 229,667 $ 56,273 $ 9,072 $ 2,001,584 Income producing commercial real estate 815,799 376,911 361,539 277,769 206,068 198,080 28,542 12,128 2,276,836 Commercial & industrial 1,092,767 287,857 263,439 115,790 92,968 58,359 515,593 3,777 2,430,550 Commercial construction 314,154 217,643 226,308 53,708 30,812 21,985 20,278 3,947 888,835 Equipment financing 413,653 270,664 125,869 39,982 9,404 445 — — 860,017 Total commercial 3,343,874 1,521,690 1,208,471 685,027 540,614 508,536 620,686 28,924 8,457,822 Residential mortgage 468,945 195,213 125,492 120,944 122,013 230,771 18 5,393 1,268,789 HELOC — — — — — — 675,878 17,581 693,459 Residential construction 225,727 30,646 4,026 4,544 3,172 12,546 — 64 280,725 Consumer 54,997 25,528 14,206 4,531 3,595 1,677 41,445 76 146,055 4,093,543 1,773,077 1,352,195 815,046 669,394 753,530 1,338,027 52,038 10,846,850 Special Mention Owner occupied commercial real estate 8,759 4,088 4,221 10,025 11,138 4,728 100 — 43,059 Income producing commercial real estate 35,471 42,831 39,954 13,238 24,164 11,337 — 1,681 168,676 Commercial & industrial 1,451 16,315 2,176 630 459 17 6,464 — 27,512 Commercial construction 21,366 272 816 23,292 11,775 477 — — 57,998 Equipment financing — — — — — — — — — Total commercial 67,047 63,506 47,167 47,185 47,536 16,559 6,564 1,681 297,245 Residential mortgage — — — — — — — — — HELOC — — — — — — — — — Residential construction — — — — — — — — — Consumer — — — — — — — — — 67,047 63,506 47,167 47,185 47,536 16,559 6,564 1,681 297,245 Substandard Owner occupied commercial real estate 6,586 10,473 7,596 3,717 6,753 8,473 1,528 674 45,800 Income producing commercial real estate 45,125 8,940 2,179 5,034 31,211 2,652 — 97 95,238 Commercial & industrial 1,545 5,536 6,193 1,684 1,292 1,485 22,170 593 40,498 Commercial construction 2,466 735 13,741 340 1,931 250 — 1,009 20,472 Equipment financing 631 1,392 1,371 306 96 17 — — 3,813 Total commercial 56,353 27,076 31,080 11,081 41,283 12,877 23,698 2,373 205,821 Residential mortgage 2,049 2,106 3,174 1,369 679 5,860 — 894 16,131 HELOC — — — — — — 265 3,393 3,658 Residential construction 106 37 54 4 124 380 — — 705 Consumer — 97 49 60 78 98 — 23 405 58,508 29,316 34,357 12,514 42,164 19,215 23,963 6,683 226,720 Total $ 4,219,098 $ 1,865,899 $ 1,433,719 $ 874,745 $ 759,094 $ 789,304 $ 1,368,554 $ 60,402 $ 11,370,815 Troubled Debt Restructurings and Other Modifications As of December 31, 2021 and 2020, United had TDRs totaling $52.4 million and $61.6 million, respectively. As of December 31, 2021 and 2020, United had remaining short-term deferrals related to the COVID-19 crisis of approximately $2.55 million and $70.7 million, respectively, which generally represented payment deferrals for up to 90 days. To the extent that these deferrals qualified under either the CARES Act or interagency guidance, they were not considered new TDRs. Loans modified under the terms of a TDR during the years ended December 31 are presented in the table below. In addition, the following table presents loans modified under the terms of a TDR that defaulted (became 90 days or more delinquent) during the years ended December 31 that were initially restructured within one year prior to default (dollars in thousands) : New TDRs Number of Post-Modification Outstanding Recorded Investment TDRs Modified Within the Year That Have Subsequently Defaulted Year Ended December 31, 2021 Rate Structure Other Total Number of Contracts Recorded Owner occupied commercial real estate 2 $ — $ 731 $ — $ 731 1 $ 99 Income producing commercial real estate 3 — — 1,697 1,697 — — Commercial & industrial 8 — 597 103 700 2 76 Commercial construction 1 — 309 — 309 — — Equipment financing 62 — 4,689 — 4,689 15 375 Total commercial 76 — 6,326 1,800 8,126 18 550 Residential mortgage 16 — 1,528 57 1,585 4 593 HELOC — — — — — 2 92 Residential construction — — — — — — — Consumer — — — — — — — Total 92 $ — $ 7,854 $ 1,857 $ 9,711 24 $ 1,235 Year Ended December 31, 2020 Owner occupied commercial real estate 8 $ — $ 833 $ 1,536 $ 2,369 — $ — Income producing commercial real estate 7 — 4,856 6,699 11,555 1 5,998 Commercial & industrial 4 — 586 15 601 3 819 Commercial construction 7 — 832 70 902 — — Equipment financing 172 — 5,821 5,821 22 944 Total commercial 198 — 12,928 8,320 21,248 26 7,761 Residential mortgage 40 — 4,359 3 4,362 2 145 HELOC 4 — 164 — 164 1 60 Residential construction 3 — 123 — 123 — — Consumer 7 — 11 24 35 1 3 Total 252 $ — $ 17,585 $ 8,347 $ 25,932 30 $ 7,969 Year Ended December 31, 2019 Owner occupied commercial real estate 4 $ — $ 1,739 $ — $ 1,739 — $ — Income producing commercial real estate 3 — 9,013 — 9,013 — — Commercial & industrial 2 — 75 7 82 — — Commercial construction — — — — — — — Equipment financing 9 — 1,071 — 1,071 — — Total commercial 18 — 11,898 7 11,905 — — Residential mortgage 15 — 2,057 — 2,057 1 135 HELOC 1 — 50 — 50 — — Residential construction 1 — — 21 21 1 13 Consumer 5 — — 45 45 — — Indirect auto 15 — — 262 262 — — Total 55 $ — $ 14,005 $ 335 $ 14,340 2 $ 148 Allowance for Credit Losses The following table presents the balance and activity in the ACL by portfolio segment for the periods indicated (in thousands) : CECL Year Ended December 31, 2021 Beginning Initial ACL- PCD loans (1) Charge-Offs Recoveries Provision Ending Owner occupied commercial real estate $ 20,673 $ 280 $ (1,640) $ 1,324 $ (6,355) $ 14,282 Income producing commercial real estate 41,737 982 (267) 496 (18,792) 24,156 Commercial & industrial 22,019 312 (4,776) 7,275 (8,238) 16,592 Commercial construction 10,952 1,969 (334) 1,081 (3,712) 9,956 Equipment financing 16,820 — (5,724) 2,619 2,575 16,290 Residential mortgage 15,341 — (344) 564 (3,171) 12,390 HELOC 8,417 1 (112) 517 (2,255) 6,568 Residential construction 764 — (10) 157 936 1,847 Consumer 287 — (2,066) 1,202 1,028 451 ACL - loans 137,010 3,544 (15,273) 15,235 (37,984) 102,532 ACL - unfunded commitments 10,558 — — — 434 10,992 Total ACL $ 147,568 $ 3,544 $ (15,273) $ 15,235 $ (37,550) $ 113,524 (1) Represents the initial ACL related to PCD loans acquired in the Aquesta transaction. Year Ended December 31, 2020 Dec. 31, 2019 Adoption of CECL Jan. 1, 2020 Initial ACL- PCD loans (1) Charge-Offs Recoveries Provision Ending Owner occupied commercial $ 11,404 $ (1,616) $ 9,788 $ 1,779 $ (70) $ 2,565 $ 6,611 $ 20,673 Income producing commercial 12,306 (30) 12,276 1,208 (8,430) 3,546 33,137 41,737 Commercial & industrial 5,266 4,012 9,278 7,680 (10,707) 1,371 14,397 22,019 Commercial construction 9,668 (2,583) 7,085 74 (726) 1,045 3,474 10,952 Equipment financing 7,384 5,871 13,255 — (8,764) 2,004 10,325 16,820 Residential mortgage 8,081 1,569 9,650 195 (398) 455 5,439 15,341 HELOC 4,575 1,919 6,494 209 (221) 677 1,258 8,417 Residential construction 2,504 (1,771) 733 — (93) 156 (32) 764 Consumer 901 (491) 410 7 (2,985) 2,259 596 287 ACL - loans 62,089 6,880 68,969 11,152 (32,394) 14,078 75,205 137,010 ACL - unfunded commitments 3,458 1,871 5,329 — — — 5,229 10,558 Total ACL $ 65,547 $ 8,751 $ 74,298 $ 11,152 $ (32,394) $ 14,078 $ 80,434 $ 147,568 (1) Represents the initial ACL related to PCD loans acquired in the Three Shores transaction. Incurred Loss Year Ended December 31, 2019 Beginning Charge-Offs Recoveries Provision Ending Owner occupied commercial real estate $ 12,207 $ (5) $ 375 $ (1,173) $ 11,404 Income producing commercial real estate 11,073 (1,227) 283 2,177 12,306 Commercial & industrial 4,802 (5,849) 852 5,461 5,266 Commercial construction 10,337 (290) 1,165 (1,544) 9,668 Equipment financing 5,452 (5,675) 781 6,826 7,384 Residential mortgage 8,295 (616) 481 (79) 8,081 HELOC 4,752 (996) 610 209 4,575 Residential construction 2,433 (306) 157 220 2,504 Consumer 853 (2,390) 911 1,527 901 Indirect auto 999 (663) 186 (522) — ACL - loans 61,203 (18,017) 5,801 13,102 62,089 ACL - unfunded commitments 3,410 — — 48 3,458 Total ACL $ 64,613 $ (18,017) $ 5,801 $ 13,150 $ 65,547 At both December 31, 2021 and 2020, United used a one-year reasonable and supportable forecast period. Expected credit losses were estimated using a regression model for each segment based on historical data from peer banks combined with a third party vendor’s economic forecast to predict the change in credit losses. These estimates were then combined with a starting value that was based on United’s recent default experience, with the results subject to a floor. At December 31, 2021, the third party vendor’s forecast, which was representative of a baseline scenario, improved significantly from December 31, 2020, including the unemployment rate which has a significant impact on our models and led to the negative provision for loan losses in 2021. At December 31, 2021, United applied qualitative factors to the model output for income producing commercial real estate and equipment finance portfolios. With regard to income producing commercial real estate, the qualitative factors reflected continued credit concerns related to the senior care portfolio, elevated criticized loans relative to the pre-pandemic period and inflationary concerns related to the impact of rising rates on commercial real estate values. Qualitative factors for the equipment finance portfolio reflected management’s approximation of long-term loss rates. For periods beyond the reasonable and supportable forecast period of one year, United reverted to historical credit loss information on a straight line basis over two years. For all collateral types excluding residential mortgage, United reverted to through-the-cycle average default rates using peer data from 2000 to 2017. For loans secured by residential mortgages, the peer data was adjusted for changes in lending practices designed to prevent the magnitude of losses observed during the mortgage crisis. PPP loans were considered low risk assets due to the related 100% guarantee by the SBA and were therefore excluded from the calculation.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment Premises and equipment are summarized as follows as of the dates indicated (in thousands) : December 31, 2021 2020 Land and land improvements $ 95,029 $ 82,816 Buildings and improvements 189,339 173,497 Furniture and equipment 100,205 96,157 Construction in progress 10,088 7,590 394,661 360,060 Less accumulated depreciation (149,365) (141,571) Premises and equipment, net $ 245,296 $ 218,489 Depreciation expense was $15.7 million, $15.6 million and $15.3 million for 2021, 2020 and 2019, respectively.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities The table below presents the fair value of derivative financial instruments as of the dates indicated as well as their classification on the consolidated balance sheets (in thousands) : December 31, 2021 December 31, 2020 Notional Amount Fair Value Notional Amount Fair Value Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Cash flow hedge of subordinated debt $ 100,000 $ 6,389 $ — $ 100,000 $ 3,378 $ — Cash flow hedge of trust preferred securities 20,000 — — 20,000 — — Fair value hedge of brokered CDs 10,000 — — 20,000 — — Total 130,000 6,389 — 140,000 3,378 — Derivatives not designated as hedging instruments: Customer derivative positions 1,206,145 28,656 10,663 1,329,271 72,508 17 Dealer offsets to customer derivative positions 1,230,885 974 9,232 1,329,271 1 24,614 Risk participations 69,385 16 7 48,843 28 12 Mortgage banking - loan commitment 110,897 3,450 — 253,243 10,751 — Mortgage banking - forward sales commitment 201,419 67 202 325,145 — 1,964 Bifurcated embedded derivatives 51,935 2,928 — 51,935 — 1,449 Dealer offsets to bifurcated embedded derivatives 51,935 — 5,041 51,935 — 947 Total 2,922,601 36,091 25,145 3,389,643 83,288 29,003 Total derivatives $ 3,052,601 $ 42,480 $ 25,145 $ 3,529,643 $ 86,666 $ 29,003 Total gross derivative instruments $ 42,480 $ 25,145 $ 86,666 $ 29,003 Less: Amounts subject to master netting agreements (694) (694) (114) (114) Less: Cash collateral received/pledged (6,620) (14,148) (3,200) (27,092) Net amount $ 35,166 $ 10,303 $ 83,352 $ 1,797 United clears certain derivatives centrally through the CME. CME rules legally characterize variation margin payments for centrally cleared derivatives as settlements of the derivatives’ exposure rather than as collateral. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting purposes. Variation margin, as determined by the CME, is settled daily. As a result, derivative contracts that clear through the CME have an estimated fair value of zero. Hedging Derivatives Cash Flow Hedges of Interest Rate Risk United enters into cash flow hedges to mitigate exposure to the variability of future cash flows or other forecasted transactions. At December 31, 2021 and 2020, United utilized interest rate caps and swaps to hedge the variability of cash flows due to changes in interest rates on certain of its variable-rate subordinated debt and trust preferred securities. United considers these derivatives to be highly effective at achieving offsetting changes in cash flows attributable to changes in interest rates. Therefore, changes in the fair value of these derivative instruments are recognized in OCI. Gains and losses related to changes in fair value are reclassified into earnings in the periods the hedged forecasted transactions occur. Losses representing amortization of the premium recorded on cash flow hedges, which is a component excluded from the assessment of effectiveness, are recognized in earnings on a straight-line basis in the same financial statement line as the hedged item over the term of the hedge. Over the next twelve months United expects to reclassify $523,000 of losses from AOCI into earnings related to these agreements. During 2019 United amortized the remaining balance of losses on de-designated cash flow hedges from AOCI. This was the only effect of cash flow hedges on the consolidated statements of income for the year December 31, 2019. See Note 17 for further detail. Fair Value Hedges of Interest Rate Risk United is exposed to changes in the fair value of certain of its fixed-rate obligations due to changes in interest rates. United uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in interest rates. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in earnings. United includes the gain or loss on the hedged items in the same income statement line item as the offsetting loss or gain on the related derivatives. At December 31, 2021 and 2020, United had interest rate swaps that were designated as fair value hedges of fixed-rate brokered time deposits. The swaps involved the receipt of fixed-rate amounts from a counterparty in exchange for United making variable rate payments over the life of the agreements. In certain cases, the estate of deceased brokered certificate of deposit holders may put the certificate of deposit back to United at par upon the death of the holder. When these events occur (estate puts), a gain or loss is recognized for the difference between the fair value and the par amount of the deposits put back. The change in the fair value of brokered time deposits that are being hedged in fair value hedging relationships reported in the table below includes gains and losses from estate puts. The table below presents the effect of derivatives in hedging relationships on the consolidated statements of income (in thousands) . Year Ended December 31, 2021 2020 2019 Total interest expense presented in the consolidated statements of income $ (29,760) $ (56,237) $ (83,312) Effect of hedging relationships on interest expense: Net income (expense) recognized on fair value hedges 210 281 (360) Net expense recognized on cash flow hedges (1) (2) (608) (359) — (1) Excludes 2019 amortization of losses related to de-designated cash flow hedges. See Note 17 for further detail. (2) Includes $472,000 and $329,000 of premium amortization expense excluded from the assessment of hedge effectiveness for the years ended December 31, 2021 and 2020 . The table below presents the carrying amount of hedged fixed-rate brokered time deposits and cumulative fair value hedging adjustments included in the carrying amount of the hedged liability for the periods presented (in thousands) . December 31, 2021 2020 Balance Sheet Location Carrying amount of Assets (Liabilities) Hedge Accounting Basis Adjustment Carrying amount of Assets (Liabilities) Hedge Accounting Basis Adjustment Deposits $ (10,026) $ (28) $ (20,216) $ (235) Derivatives Not Designated as Hedging Instruments Customer derivative positions include swaps, caps, and collars between United and certain commercial loan customers with offsetting positions to dealers under a back-to-back program. In addition, United occasionally enters into credit risk participation agreements with counterparty banks to accept or transfer a portion of the credit risk related to interest rate swaps. The agreements, which are typically executed in conjunction with a participation in a loan with the same customer, allow customers to execute an interest rate swap with one bank while allowing for the distribution of the credit risk among participating members. United also has three interest rate swap contracts that are economic hedges of market-linked brokered certificates of deposit, but are not designated as hedging instruments. The market-linked brokered certificates of deposit contain embedded derivatives that are bifurcated from the host instruments and marked to market through earnings. The fair value marks on the market linked swaps and the bifurcated embedded derivatives tend to move in opposite directions with changes in 90-day LIBOR and therefore provide an economic hedge. In addition, United originates certain residential mortgage loans with the intention of selling these loans. Between the time United enters into an interest-rate lock commitment to originate a residential mortgage loan that is to be held for sale and the time the loan is funded and eventually sold, United is subject to the risk of variability in market prices. United also enters into forward sale agreements to mitigate risk and to protect the expected gain on the eventual loan sale. The commitments to originate residential mortgage loans and forward loan sales commitments are freestanding derivative instruments. Fair value adjustments on these derivative instruments are recorded within mortgage loan gains and related fees in the consolidated statements of income. The table below presents the gains and losses recognized in income on derivatives not designated as hedging instruments for the periods indicated (in thousands) . Income Statement Location Year Ended December 31, 2021 2020 2019 Customer derivatives and dealer offsets Other noninterest income $ 3,302 $ 6,732 $ 2,878 Bifurcated embedded derivatives and dealer offsets Other noninterest income 433 (63) 212 De-designated hedges Other noninterest income — — (193) Mortgage banking derivatives Mortgage loan revenue (1,805) (7,873) (1,797) Risk participations Other noninterest income (90) (340) (3) Total gains and losses $ 1,840 $ (1,544) $ 1,097 Credit-risk-related Contingent Features United manages its credit exposure on derivative transactions by entering into a bilateral credit support agreement with each non-customer counterparty. The credit support agreements require collateralization of exposures beyond specified minimum threshold amounts. The details of these agreements, including the minimum thresholds, vary by counterparty. United’s agreements with each of its derivative counterparties contain a provision where if either party defaults on any of its indebtedness, then it could also be declared in default on its derivative obligations. The agreements with derivative counterparties also include provisions that if not met, could result in United being declared in default. United has agreements with certain of its derivative counterparties that provide that if United fails to maintain its status as a well-capitalized institution or is subject to a prompt corrective action directive, the counterparty could terminate the derivative positions and United would be required to settle its obligations under the agreements. Derivatives that are centrally cleared do not have credit-risk-related features that require additional collateral if United’s credit rating were downgraded.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The carrying amount of goodwill and other intangible assets is summarized below as of the dates indicated (in thousands) : December 31, 2021 2020 Core deposit intangible $ 38,192 $ 36,162 Less: accumulated amortization (25,870) (22,148) Net core deposit intangible 12,322 14,014 Customer relationship intangible 8,400 — Less: accumulated amortization (322) — Net customer relationship intangible 8,078 — Total intangibles subject to amortization, net 20,400 14,014 Goodwill 452,007 367,809 Total goodwill and other intangible assets, net $ 472,407 $ 381,823 In addition to the FinTrust customer relationship intangible discussed in Note 3, during 2021 United purchased the customer lists of two financial advisory firms for an aggregate purchase price of $870,000. All consideration paid was allocated to a customer relationship intangible. The following is a summary of changes in the carrying amounts of goodwill for the years indicated (in thousands) : Goodwill (1) December 31, 2019 $ 327,425 Acquisition of Three Shores 40,384 December 31, 2020 367,809 Acquisition of FinTrust 14,163 Acquisition of Aquesta 70,035 December 31, 2021 $ 452,007 (1) Goodwill balances presented are shown net of accumulated impairment losses of $306 million incurred prior to 2019. Gross goodwill for December 31, 2021, 2020, and 2019 totaled $758 million, $673 million and $633 million, respectively. The estimated aggregate amortization expense for future periods for finite lived intangibles is as follows (in thousands) : Year 2022 $ 4,081 2023 3,447 2024 2,849 2025 2,169 2026 1,709 Thereafter 6,145 Total $ 20,400

Servicing Assets and Liabilitie

Servicing Assets and Liabilities	12 Months Ended
	Dec. 31, 2021
Transfers and Servicing [Abstract]
Servicing Assets and Liabilities	Servicing Assets and Liabilities Servicing Rights for SBA/USDA Loans United accounts for servicing rights for SBA/USDA loans at fair value. The following table summarizes the changes in SBA/USDA servicing rights for the years indicated ( in thousands ). 2021 2020 2019 Beginning of period $ 6,462 $ 6,794 $ 7,510 Acquired servicing rights 581 — — Originated servicing rights capitalized upon sale of loans 2,005 1,114 1,835 Disposals (1,430) (624) (1,258) Changes in fair value due to change in inputs or assumptions used in the valuation (1,105) (822) (1,293) End of period $ 6,513 $ 6,462 $ 6,794 The portfolio of SBA/USDA loans serviced for others, which is not included in the accompanying balance sheets, was $428 million and $402 million, respectively, at December 31, 2021 and 2020. The amount of contractually specified servicing fees earned by United on these servicing rights during the years ended December 31, 2021, 2020 and 2019 was $3.90 million, $3.77 million and $3.82 million, respectively. A summary of the key characteristics, inputs, and economic assumptions used in the discounted cash flow method utilized to estimate the fair value of the servicing asset for SBA/USDA loans and the sensitivity of the fair values to immediate adverse changes in those assumptions are shown in the table below as of the dates indicated (dollars in thousands) : December 31, 2021 2020 Fair value of retained servicing assets $ 6,513 $ 6,462 Prepayment rate assumption: Weighted average 16.3 % 17.8 % Range 3.2% - 31.3% 2.7% - 33.6% 10% adverse change $ (309) $ (358) 20% adverse change (591) (680) Discount rate: Weighted average 10.3 % 8.9 % Range 0.0% - 45.4% 1.6% - 44.1% 100 bps adverse change $ (166) $ (171) 200 bps adverse change (323) (333) The above sensitivities are hypothetical and changes in fair value based on variations in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, in this table, the effect of a variation in a particular assumption is calculated without changing any other assumption. In reality, changes in one factor may result in changes in another, which might magnify or counteract the sensitivities. Residential Mortgage Servicing Rights United accounts for residential mortgage servicing rights at fair value. The following table summarizes the changes in residential mortgage servicing rights for the years indicated ( in thousands ). 2021 2020 2019 Beginning of period $ 16,216 $ 13,565 $ 11,877 Originated servicing rights capitalized upon sale of loans 12,510 11,911 5,783 Disposals (4,275) (2,868) (1,098) Changes in fair value due to change in inputs or assumptions used in the valuation 710 (6,392) (2,997) End of period $ 25,161 $ 16,216 $ 13,565 The portfolio of residential mortgage loans serviced for others, which is not included in the consolidated balance sheets, was $2.82 billion and $2.31 billion, respectively, at December 31, 2021 and 2020. The amount of contractually specified servicing fees earned by United on these servicing rights during the years ended December 31, 2021, 2020 and 2019 was $6.48 million, $4.82 million and $3.67 million, respectively. A summary of the key characteristics, inputs, and economic assumptions used to estimate the fair value of the servicing asset for residential mortgage loans and the sensitivity of the fair values to immediate adverse changes in those assumptions are shown in the table below as of the dates indicated (in thousands) : December 31, 2021 2020 Fair value of retained servicing assets $ 25,161 $ 16,216 Prepayment rate assumption: Weighted average 12.6 % 17.7 % Range 7.0% - 77.6% 8.7% - 19.5% 10% adverse change $ (1,229) $ (999) 20% adverse change (2,367) (1,912) Discount rate: Weighted average 9.5 % 10.0 % Range 9.5% - 10.5% 10.0% - 11.0% 100 bps adverse change $ (877) $ (518) 200 bps adverse change (1,693) (1,001) The above sensitivities are hypothetical and changes in fair value based on variations in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, in this table, the effect of a variation in a particular assumption is calculated without changing any other assumption. In reality, changes in one factor may result in changes in another, which might magnify or counteract the sensitivities. Servicing Liabilities for Equipment Financing Loans United accounts for servicing liabilities associated with sold equipment finance loans using the amortization method. The portfolio of equipment financing loans serviced for others, which is not included in the accompanying balance sheets, was $78.8 million and $45.5 million at December 31, 2021 and 2020, respectively. The servicing liabilities related to these loans totaled $675,000 and $357,000 at December 31, 2021 and 2020, respectively.

Time Deposits

Time Deposits	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Time Deposits	Time Deposits At December 31, 2021, the contractual maturities of time deposits, including brokered time deposits, are summarized as follows (in thousands) : 2022 $ 1,237,100 2023 142,305 2024 35,497 2025 21,479 2026 19,810 Thereafter 50,260 Total time deposits $ 1,506,451 At December 31, 2021 and 2020, time deposits, excluding brokered time deposits, that met or exceeded the FDIC insurance limit of $250,000 totaled $269 million and $317 million, respectively.

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt Long-term debt consisted of the following (in thousands) : December 31, Issue Date Stated Maturity Date Earliest Call Date 2021 2020 Interest Rate Obligations of the Bank: 2026 subordinated debentures $ — $ 15,000 2016 2026 2021 5.875% through August 2021, 3-month LIBOR plus 4.70% thereafter — 15,000 Obligations of the Holding Company: 2022 senior debentures — 50,000 2015 2022 2020 5.000% through August 2020, 3-month LIBOR plus 3.814% thereafter 2027 senior debentures 35,000 35,000 2015 2027 2025 5.500% through August 2025, 3-month LIBOR plus 3.71% thereafter 2030 senior debentures 100,000 100,000 2020 2030 2025 5.00% through June 2025, 3-month SOFR plus 4.87% thereafter Total senior debentures 135,000 185,000 2028 subordinated debentures 100,000 100,000 2018 2028 2023 4.500% through January 2023, 3-month LIBOR plus 2.12% thereafter 2025 subordinated debentures — 11,250 2015 2025 2020 6.250% Total subordinated debentures 100,000 111,250 Southern Bancorp Capital Trust I — 4,382 2004 2034 2009 Prime + 1.00% Tidelands Statutory Trust I 8,248 8,248 2006 2036 2011 3-month LIBOR plus 1.38% Four Oaks Statutory Trust I 12,372 12,372 2006 2036 2011 3-month LIBOR plus 1.35% Total trust preferred securities 20,620 25,002 Less net discount (8,260) (9,296) Total long-term debt $ 247,360 $ 326,956 Interest is currently paid at least semiannually for all senior and subordinated debentures, and trust preferred securities.

Operating Leases

Operating Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Operating Leases	Operating Leases The following table presents the balances of the ROU asset and corresponding operating lease liability as of the dates indicated (in thousands). December 31, Balance Sheet Location 2021 2020 ROU asset Other assets $ 29,421 $ 31,398 Operating lease liability Other liabilities 31,072 33,095 During 2021, United obtained building and office space ROU assets resulting in an increase in its operating lease liability of $4.49 million. Leases assumed as part of the FinTrust and Aquesta transactions accounted for $2.87 million of the increase. During 2020, United obtained building and office space ROU assets resulting in an increase in its operating lease liability of $17.4 million. Leases assumed as part of the Three Shores transaction accounted for $15.1 million of the increase. The table below presents the operating lease income and expense recognized for the periods indicated (in thousands). Income Statement Location 2021 2020 2019 Operating lease cost Occupancy expense $ 8,186 $ 6,449 $ 5,067 Variable lease cost Occupancy expense 1,066 757 449 Short-term lease cost Occupancy expense 85 100 136 Total lease cost $ 9,337 $ 7,306 $ 5,652 Sublease income and rental income from owned properties under operating leases Other noninterest income $ 976 $ 1,022 $ 1,160 Weighted average remaining lease term 5.40 years 5.74 years 5.33 years Weighted average discount rate 1.58 % 1.79 % 2.79 % As of December 31, 2021, future minimum lease payments under operating leases were as follows (in thousands) : Year 2022 $ 8,197 2023 8,080 2024 4,222 2025 2,933 2026 2,756 Thereafter 6,242 Total 32,430 Less discount (1,358) Present value of lease liability $ 31,072

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, United uses a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). United has processes in place to review the significant valuation inputs and to reassess how the instruments are classified in the valuation framework. Fair Value Hierarchy Level 1 Valuation is based upon quoted prices (unadjusted) in active markets for identical assets or liabilities that United has the ability to access. Level 2 Valuation is based upon quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 Valuation is generated from model-based techniques that use at least one significant assumption based on unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. United’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. The following is a description of the valuation methodologies used for assets and liabilities recorded at fair value. Investment Securities AFS debt securities and equity securities with readily determinable fair values are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities include mortgage-backed securities issued by government sponsored entities, municipal bonds, corporate debt securities and asset-backed securities and are valued based on observable inputs that include: quoted market prices for similar assets, quoted market prices that are not in an active market or other inputs that are observable in the market and can be corroborated by observable market data for substantially the full term of the securities. Securities classified as Level 3 include those traded in less liquid markets and are valued based on estimates obtained from broker-dealers that are not directly observable. Deferred Compensation Plan Assets and Liabilities Included in other assets in the consolidated balance sheets are assets related to employee deferred compensation plans. The assets associated with these plans are invested in mutual funds and classified as Level 1. Deferred compensation liabilities, also classified as Level 1, are carried at the fair value of the obligation to the employee, which mirrors the fair value of the invested assets and is included in other liabilities in the consolidated balance sheets. Mortgage Loans Held for Sale United has elected the fair value option for newly originated mortgage loans held for sale in order to reduce certain timing differences and better match changes in fair values of the loans with changes in the value of derivative instruments used to economically hedge them. The fair value of mortgage loans held for sale is determined using quoted prices for a similar asset, adjusted for specific attributes of that loan and are classified as Level 2. Derivative Financial Instruments United uses derivatives to manage interest rate risk. The valuation of these instruments is typically determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments. The variable cash payments are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. United also uses best effort and mandatory delivery forward loan sale commitments to hedge risk in its mortgage lending business. United incorporates credit valuation adjustments (“CVAs”) as necessary to appropriately reflect the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, United has considered the effect of netting and any applicable credit enhancements, such as collateral postings, thresholds and guarantees. Management has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy. However, the CVAs associated with these derivatives utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by itself and its counterparties. Generally, management’s assessment of the significance of the CVAs has indicated that they are not a significant input to the overall valuation of the derivatives. In cases where management’s assessment indicates that the CVA is a significant input, the related derivative is disclosed as a Level 3 value. Other derivatives classified as Level 3 include structured derivatives for which broker quotes, used as a key valuation input, were not observable. Risk participation agreements are classified as Level 3 instruments due to the incorporation of significant Level 3 inputs used to evaluate the probability of funding and the likelihood of customer default. Interest rate lock commitments, which relate to mortgage loan commitments, are categorized as Level 3 instruments as the fair value of these instruments is based on unobservable inputs for commitments that United does not expect to fund. Servicing Rights for Residential Mortgage and SBA/USDA Loans United recognizes servicing rights upon the sale of residential mortgage and SBA/USDA loans sold with servicing retained. Management has elected to carry these assets at fair value. Given the nature of the assets, the key valuation inputs are unobservable and management considers these Level 3 assets. For disclosure regarding the fair value of servicing rights, see Note 10. Assets and Liabilities Measured at Fair Value on a Recurring Basis The table below presents United’s assets and liabilities measured at fair value on a recurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall (in thousands) : December 31, 2021 Level 1 Level 2 Level 3 Total Assets: AFS debt securities: U.S. Treasuries $ 217,520 $ — $ — $ 217,520 U.S. Government agencies & GSEs — 187,032 — 187,032 State and political subdivisions — 275,844 — 275,844 Residential MBS — 2,145,134 — 2,145,134 Commercial MBS — 873,851 — 873,851 Corporate bonds — 190,771 2,395 193,166 Asset-backed securities — 604,277 — 604,277 Equity securities with readily determinable fair values — 1,302 — 1,302 Mortgage loans held for sale — 44,109 — 44,109 Deferred compensation plan assets 11,769 — — 11,769 Servicing rights for SBA/USDA loans — — 6,513 6,513 Residential mortgage servicing rights — — 25,161 25,161 Derivative financial instruments — 35,722 6,758 42,480 Total assets $ 229,289 $ 4,358,042 $ 40,827 $ 4,628,158 Liabilities: Deferred compensation plan liability $ 11,795 $ — $ — $ 11,795 Derivative financial instruments — 20,097 5,048 25,145 Total liabilities $ 11,795 $ 20,097 $ 5,048 $ 36,940 December 31, 2020 Level 1 Level 2 Level 3 Total Assets: AFS debt securities: U.S. Treasuries $ 128,072 $ — $ — $ 128,072 U.S. Government agencies & GSEs — 152,972 — 152,972 State and political subdivisions — 274,472 — 274,472 Residential MBS — 1,485,585 — 1,485,585 Commercial MBS — 549,131 — 549,131 Corporate bonds — 70,017 1,750 71,767 Asset-backed securities — 562,722 — 562,722 Equity securities with readily determinable fair values 774 913 — 1,687 Mortgage loans held for sale — 105,433 — 105,433 Deferred compensation plan assets 9,584 — — 9,584 Servicing rights for SBA/USDA loans — — 6,462 6,462 Residential mortgage servicing rights — — 16,216 16,216 Derivative financial instruments — 75,887 10,779 86,666 Total assets $ 138,430 $ 3,277,132 $ 35,207 $ 3,450,769 Liabilities: Deferred compensation plan liability $ 9,590 $ — $ — $ 9,590 Derivative financial instruments — 26,595 2,408 29,003 Total liabilities $ 9,590 $ 26,595 $ 2,408 $ 38,593 For disclosure regarding the fair value of servicing rights, see Note 10. The following table shows a reconciliation of the beginning and ending balances for all other assets measured at fair value on a recurring basis using significant unobservable inputs that are classified as Level 3 values (in thousands) : Derivative Derivative Corporate Bonds December 31, 2018 $ 11,841 $ 15,732 $ 995 Sales and settlements (1,135) (2,330) — Fair value adjustments included in OCI — — 3 Fair value adjustments included in earnings (3,468) (4,843) — December 31, 2019 7,238 8,559 998 Transfers into Level 3 (1) 583 — — Additions 368 — 1,750 Sales and settlements — — (1,000) Fair value adjustments included in OCI — — 2 Fair value adjustments included in earnings 2,590 (6,151) — December 31, 2020 10,779 2,408 1,750 Transfers into Level 3 (1) 74 — — Additions 261 170 500 Fair value adjustments included in OCI — — 145 Fair value adjustments included in earnings (4,356) 2,470 — December 31, 2021 $ 6,758 $ 5,048 $ 2,395 (1) Certain derivative assets were transferred from Level 2 to Level 3 of the fair value hierarchy due to a change in the assessment of significance of the CVA. The following table presents quantitative information about recurring Level 3 fair value measurements, excluding servicing rights which are detailed in Note 10 (in thousands) : Level 3 Assets and Liabilities Valuation Technique December 31, Significant Unobservable Inputs 2021 2020 Range Weighted Average Range Weighted Average Derivative assets - mortgage Internal model Pull through rate 45.9% - 100% 87.2% 65.6% - 100% 83.9% Derivative assets - customer derivative positions Internal model Estimated loss rate 33.4 - 44.0 36.0 100 - 100 100 Derivative assets & liabilities - other Dealer priced Dealer priced N/A N/A N/A N/A Corporate bonds Indicative bid provided by a broker Multiple factors, including but not limited to, current operations, financial condition, cash flows, and similar financing transactions executed in the market N/A N/A Discounted cash flow Discount rate 3.6 - 3.8 3.6 Fair Value Option United records mortgage loans held for sale at fair value under the fair value option. Interest income on these loans is calculated based on the note rate of the loan and is recorded in interest revenue. The following tables present the fair value and outstanding principal balance of these loans, as well as the gain or loss recognized resulting from the change in fair value for the periods indicated (in thousands) . Mortgage Loans Held for Sale December 31, 2021 2020 Outstanding principal balance $ 42,581 $ 99,746 Fair value 44,109 105,433 Amount of Gain (Loss) Recognized on Location 2021 2020 2019 Mortgage loan gains and other related fees $ (4,159) $ 3,815 $ 1,177 Changes in fair value were mostly offset by hedging activities. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis United may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis. These adjustments to fair value usually result from the application of lower of amortized cost or fair value accounting or write-downs of individual assets due to impairment. The following table presents the fair value hierarchy and carrying value of all assets that were still held as of December 31, 2021 and 2020, for which a nonrecurring fair value adjustment was recorded during the periods presented (in thousands) . December 31, 2021 Level 1 Level 2 Level 3 Total Loans $ — $ — $ 2,536 $ 2,536 December 31, 2020 Loans $ — $ — $ 29,404 $ 29,404 Loans that are reported above as being measured at fair value on a nonrecurring basis are generally impaired loans that have either been partially charged off or have been assigned a specific reserve. Nonaccrual loans that are collateral dependent are generally written down to net realizable value, which reflects fair values less the estimated costs to sell. Specific reserves that are established based on appraised value of collateral are considered nonrecurring fair value adjustments as well. When the fair value of the collateral is based on an observable market price or a current appraised value, United records the impaired loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value is further impaired below the appraised value and there is no observable market price, United records the impaired loan as nonrecurring Level 3. Assets and Liabilities Not Measured at Fair Value For financial instruments that have quoted market prices, those quotes are used to determine fair value. Financial instruments that have no defined maturity, have a remaining maturity of 180 days or less, or reprice frequently to a market rate are assumed to have a fair value that approximates reported book value, after taking into consideration any applicable credit risk. If no market quotes are available, financial instruments are valued by discounting the expected cash flows using an estimated current market interest rate for the financial instrument. For off-balance sheet derivative instruments, fair value is estimated as the amount that United would receive or pay to terminate the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. Cash and cash equivalents and have short maturities and therefore the carrying value approximates fair value. Due to the short-term settlement of accrued interest receivable and payable, the carrying amount closely approximates fair value. Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect the premium or discount on any particular financial instrument that could result from the sale of United’s entire holdings. All estimates are inherently subjective in nature. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing on and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include the mortgage banking operation, wealth management network, deferred income taxes, premises and equipment and goodwill. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates. Off-balance sheet instruments (commitments to extend credit and standby letters of credit) for which draws can be reasonably predicted are generally short-term and at variable rates. Therefore, both the carrying amount and the estimated fair value associated with these instruments are immaterial. The carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis in United’s consolidated balance sheets are as follows (in thousands) : Carrying Amount Fair Value Level December 31, 2021 Level 1 Level 2 Level 3 Total Assets: HTM debt securities $ 1,156,098 $ — $ 1,148,804 $ — $ 1,148,804 Loans, net 11,657,814 — — 11,607,821 11,607,821 Liabilities: Deposits 18,241,179 — 18,239,934 — 18,239,934 Long-term debt 247,360 — — 267,064 267,064 December 31, 2020 Assets: HTM debt securities $ 420,361 $ — $ 437,193 $ — $ 437,193 Loans, net 11,233,805 — — 11,209,717 11,209,717 Liabilities: Deposits 15,232,358 — 15,232,274 — 15,232,274 Long-term debt 326,956 — — 336,763 336,763

Common and Preferred Stock

Common and Preferred Stock	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Common and Preferred Stock	Common and Preferred Stock Common Stock During the second quarter of 2021, United’s shareholders approved an increase in the number of authorized shares of common stock from 150 million to 200 million shares. In November of 2021, United’s Board re-authorized its common stock repurchase program to permit the repurchase of up to $50 million of its common stock. The program is scheduled to expire on the earlier of United’s repurchase of its common stock having an aggregate purchase price of $50 million or December 31, 2022. Under the program, shares may be repurchased in open market transactions or in privately negotiated transactions, from time to time, subject to market conditions. During 2021, 2020 and 2019 492,744, 826,482 and 500,495 shares were repurchased under the program, respectively. As of December 31, 2021, United had remaining authorization to repurchase up to $50.0 million of outstanding common stock under the program. United sponsors a DRIP that allows participants who already own United’s common stock to purchase additional shares directly from the Company. The DRIP also allows participants to automatically reinvest their quarterly dividends in additional shares of common stock without a commission. In 2021, 2020 and 2019, 10,081, 38,107 and 62,629 shares, respectively, were issued under the DRIP. Preferred Stock During 2020, United issued $100 million, or 4,000 shares, of Series I perpetual non-cumulative preferred stock (“Preferred Stock”) with a dividend rate of 6.875% per annum for net proceeds of $96.4 million and corresponding depositary shares each representing a 1/1,000th interest in one share of Preferred Stock. If declared, dividends are payable quarterly in arrears. The Preferred Stock has no stated maturity and redemption is solely at the option of United in whole, but not in part, upon the occurrence of a regulatory capital treatment event, as defined. In addition, the Preferred Stock may be redeemed on or after September 15, 2025 at a cash redemption price equal to $25,000 per share (equivalent to $25 per depositary share) plus any declared and unpaid dividends. As of December 31, 2021 and 2020, the Preferred Stock had a carrying amount of $96.4 million.

Equity Compensation Plans

Equity Compensation Plans	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Equity Compensation Plans	Equity Compensation Plans United has an equity compensation plan that allows for grants of various stock-based compensation. Options granted under the plan can have an exercise price no less than the fair market value of the underlying stock at the date of grant. The general terms of the plan include a vesting period (usually four years) with an exercisable period not to exceed ten years. Certain options and restricted stock unit awards provide for accelerated vesting if there is a change in control of United or certain other conditions are met (as defined in the plan document). As of December 31, 2021, 600,106 additional awards could be granted under the plan. Restricted stock units and options outstanding and activity for the years ended December 31 consisted of the following: Restricted Stock Units Options Shares Weighted Average Grant Date Fair Value Aggregate Shares Weighted Average Exercise Price Weighted Average Remaining Term (Yrs.) Aggregate Intrinsic Value (000’s) December 31, 2018 759,746 $ 27.66 47,139 $ 27.07 Granted 315,827 26.74 — — Vested / Exercised (216,138) 25.38 (13,000) 16.34 Expired — (30,243) 31.43 Cancelled (51,011) 27.18 (2,396) 29.68 December 31, 2019 808,424 27.94 1,500 27.95 Granted 446,512 19.15 — — Vested / Exercised (324,697) 26.42 — — Expired — (1,500) 27.95 Cancelled (36,808) 25.73 — — December 31, 2020 893,431 23.75 — — Granted 302,701 30.34 62,743 8.30 Vested / Exercised (330,598) 26.13 $ 10,855 (27,283) 8.20 $ 765 Cancelled (57,060) 25.15 — — December 31, 2021 808,474 25.15 29,057 35,460 8.38 2.01 977 Vested / Exercisable at December 31, 2021 — — 35,460 8.38 2.01 977 Options granted in 2021 were related to the Aquesta acquisition, with the weighted average exercise price of Aquesta’s fully vested converted options determined pursuant to the purchase agreement. The value of the Aquesta options was determined using a Black-Scholes model and was included in the purchase price for the acquisition. Because the options were deep in the money and had very short remaining terms, the values were not materially different from the intrinsic value of the options. No compensation expense relating to options was included in earnings for 2021, 2020 or 2019. Compensation expense for restricted stock units without market conditions is based on the market value of United’s common stock on the date of grant. United recognizes the impact of forfeitures as they occur. The value of restricted stock unit awards is amortized into expense over the service period. Compensation expense recognized in the consolidated statements of income for employee restricted stock unit awards in 2021 and 2020 was $6.07 million and $7.40 million, respectively, which was recognized in salaries and employee benefits expense. In 2019, compensation expense for employee restricted stock awards was $8.98 million, of which $1.38 million related to the modification of existing awards resulting from an acceleration of vesting of awards due to retirement and $740,000 related to awards granted in conjunction with an acquisition, both of which were recognized in merger-related and other charges in the consolidated statement of income. The remaining 2019 expense of $6.86 million was recognized in salaries and employee benefits expense. In addition, in 2021, 2020, and 2019, $489,000, $484,000 and $379,000, respectively, was recognized in other operating expenses for restricted stock unit awards granted to members of the Board. During 2021, 2020, and 2019, in addition to time-based restricted stock unit awards, the Board approved PSUs. The PSUs vest based on achieving, during the applicable calendar-year performance periods, certain performance and market targets relative to a bank peer group. Achievement of the base-level performance and market targets for all applicable periods will result in the issuance of 174,713 shares, which are included in the outstanding balance in the table above. Additional shares may be issued if more stringent performance and market hurdles are met. The grant date per share fair market value of these PSUs was estimated using the Monte Carlo Simulation valuation model. Deferred income tax benefits related to compensation expense for options and restricted stock units of $1.67 million, $2.01 million and $2.39 million were included in the determination of income tax expense in 2021, 2020 and 2019, respectively. As of December 31, 2021, there was $15.5 million of unrecognized compensation cost related to restricted stock units granted under the plan. The cost is expected to be recognized over a weighted-average period of 2.5 years.

Reclassifications Out of AOCI

Reclassifications Out of AOCI	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Reclassifications Out of AOCI	Reclassifications Out of AOCI The following presents the details regarding amounts reclassified out of AOCI (in thousands). Amounts Reclassified from AOCI For the Years Ended December 31, Details about AOCI Components Affected Line Item in the Statement Where Net Income is Presented 2021 2020 2019 Realized gains (losses) on AFS securities: $ 83 $ 748 $ (1,021) Securities gains (losses), net 46 (191) 247 Income tax (expense) benefit $ 129 $ 557 $ (774) Net of tax Amortization of losses included in net income on AFS securities transferred to HTM: $ — $ (723) $ (383) Investment securities interest revenue — 173 92 Income tax benefit $ — $ (550) $ (291) Net of tax Reclassifications related to derivative financial instruments accounted for as cash flow hedges: Amortization of losses on de-designated positions $ — $ — $ (235) Other expense Amortization of losses on de-designated positions — — (102) Deposit interest expense Interest rate contracts (608) (359) — Long-term debt interest expense (608) (359) (337) Total before tax 156 91 86 Income tax benefit $ (452) $ (268) $ (251) Net of tax Reclassifications related to defined benefit pension plan activity: Prior service cost $ (469) $ (531) $ (640) Salaries and employee benefits expense Actuarial losses (575) (326) (59) Other expense Termination of Funded Plan — — (1,558) Merger-related and other (1,044) (857) (2,257) Total before tax 267 219 576 Income tax benefit $ (777) $ (638) $ (1,681) Net of tax Total reclassifications for the period $ (1,100) $ (899) $ (2,997) Net of tax Amounts shown above in parentheses reduce earnings

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic and diluted net income per common share for the years indicated (in thousands, except per share data) : Year Ended December 31, 2021 2020 2019 Net income $ 269,801 $ 164,089 $ 185,721 Earnings allocated to participating securities (1,657) (1,287) (1,375) Dividends on preferred stock (6,875) (3,533) — Net income available to common stockholders $ 261,269 $ 159,269 $ 184,346 Net income per common share: Basic $ 2.97 $ 1.91 $ 2.31 Diluted 2.97 1.91 2.31 Weighted average common shares: Basic 87,940 83,184 79,700 Effect of dilutive securities: Stock options 9 — 1 Restricted stock units 148 64 7 Diluted 88,097 83,248 79,708 At December 31, 2021 and 2020, United had no potentially dilutive instruments outstanding that were not included in the above analysis.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense is as follows for the years indicated (in thousands) : Year Ended December 31, 2021 2020 2019 Current $ 57,175 $ 42,688 $ 38,082 Deferred 20,787 2,668 14,909 Total income tax expense $ 77,962 $ 45,356 $ 52,991 The differences between the provision for income taxes and the amount computed by applying the statutory federal income tax rate of 21% in 2021, 2020 and 2019 to income before income taxes are as follows for the years indicated (in thousands) : Year Ended December 31, 2021 2020 2019 Income tax expense on pretax income at statutory rates $ 73,030 $ 43,983 $ 50,130 Add (deduct): State taxes, net of federal benefit 9,188 5,928 7,168 BOLI earnings (745) (1,052) (1,127) Adjustment to reserve for uncertain tax positions 153 (1,212) 84 Tax-exempt interest revenue (2,520) (2,169) (1,827) Equity compensation (891) (174) (375) Transaction costs 117 217 16 Tax credit investments (598) (930) (464) Other 228 765 (614) Total income tax expense $ 77,962 $ 45,356 $ 52,991 The following summarizes the sources and expected tax consequences of future taxable deductions (revenue) which comprise the net DTA as of the dates indicated (in thousands) : December 31, 2021 2020 DTAs: ACL $ 24,349 $ 33,213 Net operating loss carryforwards 16,656 22,277 Deferred compensation 11,011 10,012 Loan purchase accounting adjustments 4,227 8,567 Nonqualified share based compensation 1,374 1,833 Accrued expenses 7,936 6,865 Unamortized pension actuarial losses and prior service cost 1,442 1,981 Unrealized losses on AFS securities 5,808 — Deferred gains on SBA/USDA loan sales 2,217 2,060 Lease liability 7,501 8,055 Other 1,107 2,062 Total DTAs 83,628 96,925 DTLs: Unrealized gains on AFS securities — 17,439 Unrealized gains on cash flow hedges 1,189 54 Acquired intangible assets 2,412 2,576 Premises and equipment 5,179 4,241 Loan origination costs 6,466 4,857 True tax leases 5,984 7,846 Servicing assets 6,779 4,816 Derivatives 1,309 2,250 ROU asset 7,102 7,642 Securities purchase accounting adjustments 2,644 3,146 Uncertain tax positions 1,945 1,813 Other 386 230 Total DTLs 41,395 56,910 Less valuation allowance 911 1,604 Net DTA $ 41,322 $ 38,411 The change in the net DTA includes an increase of $2.12 million due to current year merger and acquisition activity. At December 31, 2021, United had: • $32.9 million of state net operating loss carryforwards subject to annual limitation under IRC Section 382 that begin to expire in 2025, if not previously utilized. • $51.1 million of state net operating loss carryforwards that begin to expire in 2031, if not previously utilized. • $51.2 million in federal net operating loss carryforwards subject to annual limitation under IRC Section 382 that begin to expire in 2027, if not previously utilized. • $3.41 million of state tax credits that begin to expire in 2022, if not previously utilized. Management assesses the valuation allowance recorded against DTAs at each reporting period. The determination of whether a valuation allowance for DTAs is appropriate is subject to considerable judgment and requires an evaluation of all the positive and negative evidence. ASC 740 requires that companies assess whether a valuation allowance should be established against their DTAs based on the consideration of all available evidence using a “more likely than not” standard. At December 31, 2021 and 2020, based on the assessment of all the positive and negative evidence, management concluded that it is more likely than not that nearly all of the net DTA will be realized based upon future taxable income. The valuation allowance of $911,000 and $1.60 million, respectively, was related to specific state income tax credits that have short carryforward periods and certain acquired state net operating losses, both of which are expected to expire unused. The valuation allowance could fluctuate in future periods based on the assessment of the positive and negative evidence. Management’s conclusion at December 31, 2021 that it was more likely than not that the net DTA of $41.3 million will be realized is based on management’s estimate of future taxable income. Management’s estimate of future taxable income is based on internal forecasts which consider historical performance, various internal estimates and assumptions, as well as certain external data all of which management believes to be reasonable although inherently subject to significant judgment. If actual results differ significantly from the current estimates of future taxable income, even if caused by adverse macro-economic conditions, the valuation allowance may need to be increased for some or all of the net DTA. A reconciliation of the beginning and ending unrecognized tax benefit related to uncertain tax positions is as follows for the years indicated (in thousands) : 2021 2020 2019 Balance at beginning of year $ 2,163 $ 3,370 $ 3,264 Additions based on tax positions related to the current year 634 421 481 Decreases resulting from a lapse in the applicable statute of limitations (441) (1,628) (375) Balance at end of year $ 2,356 $ 2,163 $ 3,370 Approximately $1.86 million of the unrecognized tax benefit at December 31, 2021 would increase income from continuing operations, and thus affect United’s effective tax rate, if ultimately recognized into income. It is United’s policy to recognize interest and penalties accrued relative to unrecognized tax benefits in their respective federal or state income taxes accounts. There were no penalties and interest related to income taxes recorded in the income statement in 2021, 2020 or 2019. No amounts were accrued for interest and penalties on the balance sheet at December 31, 2021 or 2020. United and its subsidiaries file a consolidated U.S. federal income tax return, as well as various state returns in the states where it operates. United’s federal and state income tax returns are no longer subject to examination by taxing authorities for years before 2018.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans Defined Contribution Benefit Plans 401(k) Plan United offers a defined contribution 401(k) plan (the “401(k) Plan”) that covers substantially all employees meeting certain minimum service requirements. The 401(k) Plan allows employees to make pre-tax contributions to the 401(k) Plan and, United matches 100% of employee contributions up to 5% of eligible compensation. Employees begin to receive matching contributions after completing one year of service. Effective January 1, 2020, United amended the 401(k) Plan to be a safe harbor plan. Under safe harbor provisions, United is required to provide a matching contribution and participants are immediately 100% vested in safe harbor matching contributions. Under the safe harbor amendment the Company will continue to match 100% of participant deferral contributions up to 5% of the participant’s annual base salary and commissions for those who have completed at least one year of service. Prior to January 1, 2020, matching contributions vested after three years of service. United’s 401(k) Plan is administered in accordance with applicable laws and regulations. Compensation expense from continuing operations related to the 401(k) Plan totaled $7.31 million, $6.16 million and $5.30 million in 2021, 2020 and 2019, respectively. Deferred Compensation Plan United also sponsors a non-qualified deferred compensation plan for its executive officers, certain other key employees and members of the Board and its community banks’ advisory boards of directors. The deferred compensation plan provides for the pre-tax deferral of compensation, fees and other specified benefits. Specifically, the deferred compensation plan permits each employee participant to elect to defer a portion of base salary, bonus or vested restricted stock units and permits each eligible director participant to elect to defer all or a portion of director’s fees. Further, the deferred compensation plan allows for additional contributions by an employee, with matching contributions by United, for amounts that exceed the allowable amounts under the 401(k) Plan. During 2021, 2020 and 2019, United recognized $73,000, $49,000 and $162,000, respectively, in matching contributions for this provision of the deferred compensation plan. The Board may also elect to make a discretionary contribution to any or all participants. No discretionary contributions were made in 2021, 2020 or 2019. In addition to common stock related to elected deferrals of vested restricted stock units, United offers its common stock as an investment option for cash contributions to the deferred compensation plan. The common stock component is accounted for as an equity instrument and is reflected in the consolidated balance sheets as common stock issuable. The deferred compensation plan does not allow for diversification once an election is made to invest in United stock and settlement must be accomplished in shares at the time the deferral period is completed. At December 31, 2021 and 2020, United had 595,705 shares and 600,834 shares, respectively, of its common stock that were issuable under the deferred compensation plan. Defined Benefit Pension Plans United has an unfunded noncontributory defined benefit pension plan, or the Modified Retirement Plan, that covers certain executive officers and other key employees. The Modified Retirement Plan provides a fixed annual retirement benefit to plan participants. Weighted-average assumptions used to determine the pension benefit obligation of the Modified Retirement Plan at year end and net periodic pension cost are shown in the table below: 2021 2020 Discount rate for disclosures 2.90 % 2.55 % Discount rate for net periodic benefit cost 2.55 % 3.25 % Measurement date 12/31/2021 12/31/2020 The Modified Retirement Plan discount rates are determined in consultation with the third-party actuary and are set by matching the projected benefit cash flow to a notional yield curve developed by reference to high-quality fixed income investments. The discount rates are determined as the rate which would provide the same present value as the plan cash flows discounted to the measurement date using the full series of spot rates along the notional yield curve as of the measurement date. United recognizes the unfunded status of the Modified Retirement Plan as a liability in the consolidated balance sheets. Information about changes in obligations and plan assets follows (in thousands) : Modified Retirement Plan 2021 2020 Accumulated benefit obligation: Accumulated benefit obligation - beginning of year $ 27,099 $ 25,105 Service cost 659 588 Interest cost 676 795 Actuarial (gains) losses (1,066) 1,804 Benefits paid (1,107) (1,193) Accumulated benefit obligation - end of year 26,261 27,099 Change in plan assets, at fair value: Beginning plan assets — — Employer contribution 1,107 1,193 Benefits paid (1,107) (1,193) Plan assets - end of year — — Funded status - end of year (plan assets less benefit obligations) $ (26,261) $ (27,099) Components of net periodic benefit cost and other amounts recognized in other comprehensive income are as follows (in thousands): 2021 2020 2019 Modified Modified Modified Funded Service cost $ 659 $ 588 $ 392 $ — Interest cost 676 795 931 166 Expected return on plan assets — — — (106) Amortization of prior service cost 469 531 635 — Amortization of net actuarial losses 576 326 59 — Net periodic benefit cost $ 2,380 $ 2,240 $ 2,017 $ 60 The following table summarizes the estimated future benefit payments expected to be paid from the Modified Retirement Plan for the periods indicated (in thousands) . 2022 $ 1,191 2023 1,185 2024 1,179 2025 1,192 2026 1,213 2027-2031 8,276 United acquired Palmetto on September 1, 2015, including its funded noncontributory defined benefit pension plan, or the Funded Plan, which covered all full-time Palmetto employees who had fulfilled at least 12 months of continuous service and attained age 21 by December 31, 2007. Benefits under the Funded Plan were no longer accrued for service subsequent to 2007. During 2019, United settled the liabilities of its Funded Plan. Participants elected to receive either lump sum distributions or annuity contracts purchased from a third-party insurance company that provided for the payment of vested benefits. United contributed $4.90 million to the Funded Plan in the third quarter 2019 to fund its liquidation. As a result of the pension termination, unrecognized losses of $1.56 million, which were previously recorded in AOCI on the consolidated balance sheets, were recognized as expense and an additional pension plan settlement loss of $1.38 million was recorded in the consolidated statements of income. Including both charges, the total Funded Plan settlement loss was $2.94 million, which was included in merger-related and other charges for the year ended December 31, 2019. Other United sponsored benefit plans United's Employee Stock Purchase Program (“ESPP”), which was terminated during 2021, allowed eligible employees to purchase shares of common stock at a discount (10%), with no commission charges. During 2021, 2020 and 2019 United issued 6,676, 34,423 shares and 20,928 shares, respectively, through the ESPP.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2021
Regulatory Capital Requirements Under Banking Regulations [Abstract]
Regulatory Matters	Regulatory Matters Capital Requirements United and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary action by regulators that, if undertaken, could have a direct material effect on United. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, United and the Bank must meet specific capital guidelines that involve quantitative measures of the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures (as defined) established by regulation to ensure capital adequacy require United and the Bank to maintain minimum amounts and ratios of total capital, Tier 1 capital, and CET1 to RWAs, and of Tier 1 capital to average assets. United and the Bank are also subject to a “capital conservation buffer,” which is designed to absorb losses during periods of economic stress. Banking organizations with a ratio of CET1 to RWAs above the minimum but below the conservation buffer (or below the combined capital conservation buffer and countercyclical capital buffer, when the latter is applied) will face constraints on dividends, equity repurchases and discretionary bonus compensation based on the amount of the shortfall. As of December 31, 2021, United and the Bank were categorized as well-capitalized under the regulatory framework for prompt corrective action in effect at such time. To be categorized as well-capitalized at December 31, 2021, United and the Bank must have exceeded the well-capitalized guideline ratios in effect at such time, as set forth in the table below and have met certain other requirements. Management believes that United and the Bank exceeded all well-capitalized requirements at December 31, 2021, and there have been no conditions or events since year-end that would change the status of well-capitalized. Pursuant to the CARES Act, United has adopted relief provided by federal banking regulatory agencies for the delay of the adverse capital impact of CECL. This optional two-year delay, which ended December 31, 2021, is followed by an optional three-year transition period to phase out the aggregate amount of capital benefit provided during the initial two-year delay. Under the transition provision, the amount of aggregate capital benefit is phased out by 25% each year with the full impact of adoption completely recognized by 2025. Regulatory capital ratios at December 31, 2021 and 2020, along with the minimum amounts required for capital adequacy purposes and to be well-capitalized under prompt corrective action provisions in effect at such times are presented below for United and the Bank (dollars in thousands) : Basel III Guidelines United Community Banks, Inc. United Community Bank Minimum (1) Well 2021 2020 2021 2020 Risk-based ratios: CET1 capital 4.5 % 6.5 % 12.46 % 12.31 % 12.87 % 13.31 % Tier 1 capital 6.0 8.0 13.17 13.10 12.87 13.31 Total capital 8.0 10.0 14.65 15.15 13.46 14.28 Tier 1 leverage ratio 4.0 5.0 8.75 9.28 8.53 9.42 CET1 capital $ 1,688,176 $ 1,506,750 $ 1,738,557 $ 1,625,292 Tier 1 capital 1,784,598 1,603,172 1,738,557 1,625,292 Total capital 1,984,376 1,854,368 1,818,335 1,743,045 RWAs 13,548,534 12,240,440 13,512,405 12,207,940 Average total assets 20,402,842 17,276,853 20,377,319 17,246,878 (1) As of December 31, 2021 and 2020, the additional capital conservation buffer in effect was 2.50%. Cash, Dividend, Loan and Other Restrictions Federal and state banking regulations place certain restrictions on dividends paid by the Bank to the Holding Company. During 2021 and 2020, the Bank paid cash dividends to the Holding Company of $217 million and $150 million, respectively. The Federal Reserve Act requires that extensions of credit by the Bank to certain affiliates, including the Holding Company, be secured by specific collateral, that the extension of credit to any one affiliate be limited to 10% of capital and surplus (as defined), and that extensions of credit to all such affiliates be limited to 20% of capital and surplus. The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of their customers. These financial instruments include commitments to extend credit and letters of credit. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets. The contract amounts of these instruments reflect the extent of involvement the Bank has in particular classes of financial instruments. The exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and letters of credit written is represented by the contractual amount of these instruments. United uses the same

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following table summarizes, as of the dates indicated, the contract amount of off-balance sheet instruments (in thousands) : December 31, 2021 2020 Financial instruments whose contract amounts represent credit risk: Commitments to extend credit $ 3,591,975 $ 3,052,657 Letters of credit 29,312 31,748 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn on, the total commitment amounts do not necessarily represent future cash requirements. Letters of credit are conditional commitments issued by United and could result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party or upon the non-performance of the customer. Those guarantees are primarily issued to local businesses and government agencies. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. In most cases, the Bank holds real estate, certificates of deposit, and other acceptable collateral as security supporting those commitments for which collateral is deemed necessary. The extent of collateral held for those commitments varies. United maintains an ACL for these unfunded commitments, which is included in other liabilities in the consolidated balance sheets. The ACL for unfunded loan commitments is determined as part of the quarterly ACL analysis. See Note 1 for further detail. The Bank holds minor investments in certain limited partnerships for CRA and tax purposes. As of December 31, 2021, the Bank had a recorded investment of $52.7 million in these limited partnerships, which is included in other assets on the consolidated balance sheet. At December 31, 2021, for certain of these investments, the Bank had commitments to fund an additional $13.7 million related to future capital calls that has not been reflected in the consolidated balance sheet. As of December 31, 2021, the Holding Company also had $10.0 million in commitments for future capital calls to a fintech fund limited partnership that has not been reflected in the consolidated balance sheet. United, in the normal course of business, is subject to various pending and threatened lawsuits in which claims for monetary damages are asserted. Although it is not possible to predict the outcome of these lawsuits, or the range of any possible loss, management, after consultation with legal counsel, does not anticipate that the ultimate aggregate liability, if any, arising from these lawsuits will have a material adverse effect on financial position or results of operations.

Condensed Financial Statements

Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only)	Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) Balance Sheets As of December 31, 2021 and 2020 (in thousands) 2021 2020 Assets Cash and cash equivalents $ 298,316 $ 289,243 Investment in Bank 2,150,683 2,028,965 Investment in other subsidiaries 23,194 752 Other assets 46,432 34,661 Total assets $ 2,518,625 $ 2,353,621 Liabilities and Shareholders’ Equity Long-term debt $ 247,360 $ 311,956 Other liabilities 49,020 34,135 Total liabilities 296,380 346,091 Shareholders’ equity 2,222,245 2,007,530 Total liabilities and shareholders’ equity $ 2,518,625 $ 2,353,621 Statements of Income For the Years Ended December 31, 2021, 2020 and 2019 (in thousands) 2021 2020 2019 Dividends from Bank $ 217,000 $ 150,000 $ — Dividends from other subsidiaries — — 4,651 Shared service fees from subsidiaries 12,402 13,020 14,721 Other 3,167 1,436 1,468 Total income 232,569 164,456 20,840 Interest expense 14,324 13,994 11,573 Other expense 16,417 16,473 18,965 Total expenses 30,741 30,467 30,538 Income tax benefit 6,908 2,681 8,711 Income (loss) before equity in undistributed earnings of subsidiaries 208,736 136,670 (987) Equity in undistributed earnings of subsidiaries 61,065 27,419 186,708 Net income $ 269,801 $ 164,089 $ 185,721 Statements of Cash Flows For the Years Ended December 31, 2021, 2020 and 2019 (in thousands) 2021 2020 2019 Operating activities: Net income $ 269,801 $ 164,089 $ 185,721 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of the subsidiaries (61,065) (27,419) (186,708) Stock-based compensation 6,554 7,887 9,360 Change in assets and liabilities: Other assets (7,800) (3,662) (3,022) Other liabilities 6,353 5,261 2,080 Net cash provided by operating activities 213,843 146,156 7,431 Investing activities: Net cash (paid) received for acquisition (47,785) 3,397 (52,093) Purchases of premises and equipment (30) — — Purchases of debt securities available-for-sale and equity securities (1,500) (2,750) (3,000) Proceeds from sales and maturities of debt securities available-for-sale and equity securities 1,253 — 83 Proceeds from sale of premises and equipment 728 — — Other investing inflows 132 — — Other investing outflows (600) — — Net cash (used in) provided by investing activities (47,802) 647 (55,010) Financing activities: Repayment of long-term debt (65,632) — (250) Proceeds from issuance of long-term debt, net of issuance costs — 98,552 — Proceeds from issuance of preferred stock, net of issuance costs — 96,422 — Cash paid for shares withheld to cover payroll taxes related to equity instruments (3,182) (3,119) (1,686) Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans 506 1,317 2,193 Proceeds from exercise of stock options and warrants 231 — 212 Repurchase of common stock (15,101) (20,782) (13,020) Cash dividends on preferred stock (6,876) (3,533) — Cash dividends on common stock (66,914) (58,912) (53,044) Net cash (used in) provided by financing activities (156,968) 109,945 (65,595) Net change in cash 9,073 256,748 (113,174) Cash at beginning of year 289,243 32,495 145,669 Cash at end of year $ 298,316 $ 289,243 $ 32,495

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividends Declared On February 17, 2022, the Board approved a regular quarterly cash dividend of $0.21 per common share and a preferred stock dividend of $429.6875 per preferred share (equivalent to $0.4296875 per depositary share, or 1/1000 interest per share). The common stock dividend is payable April 5, 2022, to common shareholders of record on March 15, 2022. The preferred stock dividend is payable March 15, 2022, to preferred shareholders of record on February 28, 2022. Acquisition of Reliant Subsequent to year-end, on January 1, 2022, United completed the acquisition of Reliant Bancorp, Inc. and its wholly-owned subsidiary, Reliant Bank, collectively referred to as “Reliant”. Reliant is headquartered in Brentwood, Tennessee, a suburb of Nashville, Tennessee. Reliant operates a 25 branch network in Tennessee, located primarily in the Nashville, Clarksville and Chattanooga metropolitan areas. It also has a manufactured housing finance group based in Knoxville. As of December 31, 2021, Reliant reported total assets of $3.00 billion, total loans of $2.38 billion, and total deposits of $2.50 billion. Reliant shareholders received $597 million in total consideration, of which $596 million was United common stock (16.6 million shares), $624,000 was cash and $795,000 was converted stock options. The acquisition will be accounted for as a business combination. Due to the timing of the acquisition, United is currently in the process of completing the purchase accounting and has not made all of the remaining required disclosures, such as the fair value of assets acquired and supplemental pro forma information, which will be disclosed in subsequent filings .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of accounting	The accounting principles followed by United and the methods of applying these principles conform with GAAP and with general practices within the banking industry. The following is a description of the significant policies.
Organization and Basis of Presentation	Organization and Basis of Presentation The Holding Company is a bank holding company under the BHC Act and, as of July 1, 2021, a financial holding company under the GLB Act. Financial holding company status allows for engagement in a broader range of financial activities. Prior to that the Holding Company was a bank holding company. The Holding Company’s principal business is conducted by its wholly-owned commercial bank subsidiary, United Community Bank. United is subject to regulation under the BHC Act. The consolidated financial statements include the accounts of the Holding Company, the Bank and other wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Effective July 1, 2021, the Bank moved its headquarters from Blairsville, Georgia to Greenville, South Carolina and became a South Carolina state-chartered bank subject to examination and reporting requirements of the SCBFI. Prior to that date, the Bank was a Georgia state-chartered bank subject to examination and reporting requirements of the GADBF. The Bank serves both rural and metropolitan markets in Georgia, South Carolina, North Carolina, Tennessee and Florida and provides a full range of banking services. The Bank is insured by and subject to the regulation of the FDIC.
Use of Estimates	Use of Estimates In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the balance sheet and revenue and expenses for the years then ended. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change are the determination of the ACL, the valuation of acquired loans, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, the valuation of goodwill and separately identifiable intangible assets associated with mergers and acquisitions, and the valuation of deferred tax assets.
Operating Segments	Operating Segments Operating segments are components of a business about which separate financial information is available and evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assessing performance. Public companies are required to report certain financial information about operating segments in interim and annual financial statements. United’s community banking operations are divided among geographic regions and local community banks within those regions. Those regions and banks have similar economic characteristics and are therefore considered to be one operating segment. Additionally, management assessed other operating units to determine if they should be classified and reported as segments, including Mortgage, Wealth Management and Commercial Banking Solutions. Qualitatively, these business units are primarily operating in the same geographic footprint as the community banks and face many of the same customers as the community banks. While the chief operating decision maker does have some limited production information for these entities, that information is not complete since it does not include a full allocation of revenue, costs and capital from key corporate functions. The business units are currently viewed more as a product line extension of the community banks. However, management will continue to evaluate these business units for separate reporting as facts and circumstances change. Based on this analysis, United concluded that it has one operating and reportable segment.
Cash and Cash Equivalents	Cash and Cash EquivalentsCash equivalents include amounts due from banks, interest-bearing deposits in banks, federal funds sold, commercial paper, reverse repurchase agreements and short-term investments and are carried at cost. Federal funds are generally sold for one-day periods, interest-bearing deposits in banks are available on demand and commercial paper investments and reverse repurchase agreements mature within a period of less than 90 days.
Investment Securities	Investment Securities Debt Securities: Debt securities are classified as HTM and carried at amortized cost when management has the positive intent and ability to hold them to maturity. Debt securities are classified as AFS when they may be sold before maturity. AFS securities are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premiums or discounts. Premiums and discounts on securities are generally amortized or accreted on the level-yield method without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Premiums on callable debt securities are amortized to their earliest call date. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Transfers of securities between categories are recorded at fair value at the date of transfer. Unrealized holding gains or losses associated with transfers of securities from AFS to HTM are included in the balance of AOCI in the consolidated balance sheets. These unrealized holding gains or losses are amortized/accreted into income over the remaining life of the security as an adjustment to the yield in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent. Interest accrued but not received for a security placed on nonaccrual is reversed against interest income. Equity securities: Equity securities are included in other assets on the consolidated balance sheets. Those with readily determinable fair values are carried at fair value with changes in fair value recognized in net income. Those without readily determinable fair values include, among others, FHLB stock held to meet FHLB requirements related to outstanding advances and CRA equity investments, including those where the returns are primarily derived from LIHTC. FHLB stock, which totaled $9.23 million at December 31, 2021, is accounted for using the cost method of accounting. LIHTC investments are accounted for using the proportional amortization method of accounting for qualified affordable housing investments which results in the amortization
ACL - Held-to-Maturity Securities, Available-For-Sale Securities, and Off-Balance Sheet Credit Exposures	United implemented CECL upon adoption of ASC 326 on January 1, 2020. The CECL framework requires an estimate of expected credit losses for the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts. The following discussion provides a description of the methodology applied to calculate the ACL under CECL. Prior to the adoption of ASC 326, management evaluated securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warranted such evaluation. ACL - HTM Debt Securities: Management measures current expected credit losses on HTM debt securities on a collective basis by major security type. The estimate of current expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management classifies the HTM portfolio into the following major security types: U.S. Treasuries, U.S. Government agencies and GSEs, state and political subdivisions, residential mortgage-backed, agency and GSEs, commercial mortgage-backed, agency and GSEs and supranational entities. Accrued interest receivable on HTM debt is excluded from the estimate of credit losses. All of the residential and commercial mortgage-backed securities held by United as HTM are issued by U.S. Government agencies and GSEs. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The state and political subdivision securities are highly rated by major rating agencies. ACL - AFS Debt Securities: For AFS debt securities in an unrealized loss position, United first assesses whether it intends to sell, or whether it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security's amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, United evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an ACL is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any amount of unrealized loss that has not been recorded through an ACL is recognized in other comprehensive income. Accrued interest receivable on AFS debt securities is excluded from the estimate of credit losses.
Loans Held for Sale	Loans Held for SaleUnited has elected the fair value option for mortgage loans held for sale in order to reduce certain timing differences and match changes in fair values of the loans with changes in the fair value of derivative instruments used to economically hedge them.
Loans and Leases	Loans and Leases Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts and deferred fees and costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income over the life of the loan. Equipment Financing Lease Receivables: Equipment financing lease receivables, which are classified as sales-type or direct financing leases, are recorded as the sum of the future minimum lease payments, initial deferred costs and, if applicable, estimated or contractual residual values less unearned income and security deposits. For lease receivables with a residual value, the determination of such value is derived from a variety of sources including equipment valuation services, appraisals, and publicly available market data on recent sales transactions on similar equipment. The length of time until contract termination, the cyclical nature of equipment values and the limited marketplace for re-sale of certain leased assets are important variables considered in making this determination. Interest income, which is included in loan interest revenue in the consolidated statements of income, is recognized as earned using the effective interest method. Direct fees and costs associated with the origination of leases are deferred and included as a component of equipment financing receivables. Net deferred fees or costs are recognized as an adjustment to interest income over the contractual life of the lease using the effective interest method. These lease agreements may include options to renew and for the lessee to purchase the leased equipment at the end of the lease term. United excludes sales taxes from consideration in these lease contracts. PCD Loans (CECL): In acquisitions, United may acquire loans, some of which have experienced more than insignificant credit deterioration since origination. In those cases, United will consider internal loan grades, delinquency status and other relevant factors in assessing whether purchased loans are PCD. PCD loans are recorded at their fair value at the acquisition date. An initial ACL is determined using the same methodology as other loans held for investment and recognized as an adjustment to the acquisition price of the asset; thus, the sum of the loan's purchase price and ACL becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent to initial recognition, PCD loans are subject to the same interest income recognition and impairment model as non-PCD loans, with changes to the ACL recorded through provision expense. Nonaccrual Loans: The accrual of interest is generally discontinued when a loan becomes 90 days past due or when management believes, after considering economic and business conditions and collection efforts, that the principal or interest will not be collectable in the normal course of business. A loan may continue to accrue interest after 90 days if it is well collateralized and in the process of collection. Past due status is based on contractual terms of the loan. During 2020 and 2021, United granted loan payment deferrals in accordance with the CARES Act and interagency guidance for certain borrowers experiencing temporary cash flow shortages as a result of the COVID-19 pandemic. During the temporary payment deferral period, these loans are not considered past due. All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. Interest received on such loans is accounted for using the cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest payments are reflected as a reduction of the carrying amount of the loan and interest income is not recognized until the loan balance is reduced to zero. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current, there is a sustained period of repayment performance and future payments are reasonably assured. TDRs: A loan for which the terms have been modified resulting in a more than insignificant concession, and for which the borrower is experiencing financial difficulties, is generally considered to be a TDR. Modified terms that result in a TDR include one or a combination of the following: a reduction of the stated interest rate of the loan, an extension of the amortization period that would not otherwise be considered in the current market for new debt with similar risk characteristics; a restructuring of the borrower’s debt into an “A/B note structure” in which the A note would fall within the borrower’s ability to pay and the remainder would be included in the B note; a mandated bankruptcy restructuring; or interest-only payment terms greater than 90 days where the borrower is unable to amortize the loan. Collateral dependent TDRs that subsequently default or are placed on nonaccrual are charged down to the fair value of the collateral consistent with United’s policy for nonaccrual loans. In accordance with the CARES Act, United implemented loan modification programs in response to the COVID-19 pandemic in order to provide borrowers with flexibility with respect to repayment terms. These loan modifications were not considered TDRs to the extent that the borrower was impacted by the COVID-19 pandemic and was not more than 30 days past due at December 31, 2019, or in certain circumstances, at the time that the COVID-19 loan modification program was implemented, unless the loan was previously classified as a TDR.
Concentration of Credit Risk	Concentration of Credit Risk: Most of United’s business activity is with customers located within the markets where it has banking operations. Therefore, United’s exposure to credit risk is significantly affected by changes in the economy within its markets. Approximately 73% of United’s loan portfolio is secured by real estate and is therefore susceptible to changes in real estate valuations.
ACL - Loans	ACL- Loans United implemented CECL upon adoption of ASC 326 on January 1, 2020. The CECL framework requires an estimate of expected credit losses for the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts. The following discussion provides a description of the methodology applied to calculate the ACL under CECL. The Incurred Loss method was utilized in periods prior to 2020 and is outlined in detail in our previously filed reports on Form 10-K. The ACL is a valuation account that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the ACL when management believes the uncollectibility of a loan balance is confirmed. Accrued interest receivable is excluded from the estimate of credit losses. Management determines the ACL balance using relevant available information from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Historical credit behaviors along with model judgments provide the basis for the estimation of expected credit losses. Adjustments to modeled loss estimates may be made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as changes in economic conditions, property values, or other relevant factors. For the majority of loans and leases the ACL is calculated using a discounted cash flow methodology applied at a loan level with a one-year reasonable and supportable forecast period and a two-year straight-line reversion period. The ACL-loans is measured on a collective basis when similar risk characteristics exist. United has identified the following portfolio segments and calculates the ACL for each using a discounted cash flow methodology at the loan level, with loss rates, prepayment assumptions and curtailment assumptions driven by each loan’s collateral type: Owner occupied commercial real estate - Loans in this category are susceptible to business failure and general economic conditions. Income producing commercial real estate - Common risks for this loan category are declines in general economic conditions, declines in real estate value, declines in occupancy rates, and lack of suitable alternative use for the property. Commercial & industrial - Risks to this loan category include the inability to monitor the condition of the collateral, which often consists of inventory, accounts receivable and other non-real estate assets. Equipment and inventory obsolescence can also pose a risk. Declines in general economic conditions and other events can cause cash flows to fall to levels insufficient to service debt. Commercial construction - Risks common to commercial construction loans are cost overruns, changes in market demand for property, inadequate long-term financing arrangements and declines in real estate values. Equipment financing - Risks associated with equipment financing are similar to those described for commercial and industrial loans, including general economic conditions, as well as appropriate lien priority on equipment, equipment obsolescence and the general mobility of the collateral. Residential mortgage - Residential mortgage loans are susceptible to weakening general economic conditions, increases in unemployment rates and declining real estate values. HELOC - Risks common to home equity lines of credit are general economic conditions, including an increase in unemployment rates, and declining real estate values that reduce or eliminate the borrower’s home equity. Residential construction - Residential construction loans are susceptible to the same risks as residential mortgage loans. Changes in market demand for property lead to longer marketing times resulting in higher carrying costs and declining values. Consumer - Risks common to consumer direct loans include unemployment and changes in local economic conditions as well as the inability to monitor collateral consisting of personal property. When management determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. When the discounted cash flow method is used to determine the ACL, management adjusts the effective interest rate used to discount expected cash flows to incorporate expected prepayments. The ACL on a TDR is measured using the same method as all other loans held for investment, except that the original interest rate is used to discount the expected cash flows, not the rate specified within the restructuring. Determining the Contractual Term: Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a TDR will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by United.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed primarily using the straight line method over the estimated useful lives of the related assets. Costs incurred for maintenance and repairs are expensed as incurred. The range of estimated useful lives for buildings and improvements is 10 to 40 years, for land improvements, 10 years, and for furniture and equipment, 3 to 10 years. United periodically reviews the carrying value of premises and equipment for impairment whenever events or circumstances indicate that the carrying amount of such assets may not be fully recoverable.
Foreclosed Properties (Other Real Estate Owned)	Foreclosed Properties (Other Real Estate Owned)Foreclosed property is initially recorded at fair value, less cost to sell. If the fair value, less cost to sell at the time of foreclosure is less than the loan balance, the deficiency is recorded as a loan charge-off against the ACL. If the fair value, less cost to sell, of the foreclosed property decreases during the holding period, a valuation allowance is established with a charge to operating expenses. When the foreclosed property is sold, a gain or loss is recognized on the sale for the difference between the sales proceeds and the carrying amount of the property.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill is an asset representing the future economic benefits from other assets acquired that are not individually identified and separately recognized. Goodwill is measured as the excess of the consideration transferred, net of the fair value of identifiable assets acquired and liabilities assumed at the acquisition date. Goodwill is not amortized, but instead is tested for impairment annually or more frequently if events or circumstances exist that indicate a goodwill impairment test should be performed. Other intangible assets, which are initially recorded at fair value, consist of core deposit and customer list intangibles resulting from acquisitions. Core deposit intangible assets are amortized over their estimated useful lives using the sum-of-the-years-digits method. Customer list intangibles are amortized over their estimated useful lives using the straight-line method. Management evaluates other intangible assets for impairment whenever events or changes in circumstances indicate the carrying amount of the asset may not be recoverable.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from United, the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets and United does not maintain effective control over the transferred assets through an agreement to repurchase them before maturity.
Servicing Rights	Servicing Rights United records a separate servicing asset for SBA loans, USDA loans, and residential mortgage loans when the loan is sold but servicing is retained. This asset represents the right to service the loans and receive a fee in compensation. Servicing assets are initially recorded at their fair value as a component of the sale proceeds. The fair value of the servicing assets is based on an analysis of discounted cash flows that incorporates estimates of (1) market servicing costs, (2) market-based prepayment rates, and (3) market profit margins. Servicing assets are included in other assets. United has elected to subsequently measure the servicing assets for government guaranteed loans and residential mortgage loans at fair value. The rate of prepayment of loans serviced is the most significant estimate involved in the measurement process. Estimates of prepayment rates are based on market expectations of future prepayment rates, industry trends, and other considerations. Actual prepayment rates will differ from those projected by management due to changes in a variety of economic factors, including prevailing interest rates and the availability of alternative financing sources to borrowers. If actual prepayments of the loans being serviced were to occur more quickly than projected, the carrying value of servicing assets might have to be written down through a charge to earnings in the current period. If actual prepayments of the loans being serviced were to occur more slowly than had been projected, the carrying value of servicing assets could increase, and servicing income would exceed previously projected amounts. United accounts for the servicing liabilities associated with sold equipment financing loans using the amortization method. Servicing liabilities are included in accrued expenses and other liabilities.
BOLI	BOLI United has purchased life insurance policies on certain key executives and members of management. United has also received life insurance policies on members of acquired bank management teams through acquisitions of other banks. BOLI is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other changes or other amounts due that are probable at settlement.
Operating Leases	Operating Leases United records a ROU asset, included in other assets, and a related lease liability, included in other liabilities, for eligible operating leases for which it is the lessee, which include leases for land, buildings, and equipment. At lease commencement, United records the ROU asset and related lease liability based on the present value of lease payments over the lease term. Absent a readily determinable interest rate in the lease agreement, United utilizes the Bank’s incremental borrowing rate for secured borrowings as the discount rate used in the present value calculation. Payments related to these leases consist primarily of base rent and, in the case of building leases, additional operating costs associated with the leased property such as common area maintenance and utilities. In most cases these operating costs vary over the term of the lease, and therefore are classified as variable lease costs, which are recognized as incurred in the consolidated statement of income. In addition, certain operating leases include costs such as property taxes and insurance, which are recognized as incurred in the consolidated statement of
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments such as commitments to make loans and commercial letters of credit issued to meet customer financing needs. The face amount for these items represents the exposure to loss before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded.
Revenue from Contracts with Customers	Revenue from Contracts with Customers In addition to lending and related activities, United offers various services to customers that generate revenue, certain of which are governed by ASC Topic 606 Revenue from Contracts with Customers . United’s services that fall within the scope of this topic are presented within noninterest income and include service charges and fees, wealth management fees, and other transaction-based fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur. Fees may be fixed or, where applicable, based on a percentage of transaction size.
Income Taxes	Income Taxes DTAs and DTLs are recorded for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Future tax benefits are recognized to the extent that realization of such benefits is more likely than not. DTAs and DTLs are measured using enacted tax rates expected to apply to taxable income in the years in which the assets and liabilities are expected to be recovered or settled. The effect of a change in tax rates on DTAs and DTLs is recognized in income tax expense during the period that includes the enactment date. In the event the future tax consequences of differences between the financial reporting bases and the tax bases of assets and liabilities results in DTAs, an evaluation of the probability of being able to realize the future benefits indicated by such asset is required. A valuation allowance is provided for the portion of the DTA when it is more likely than not that some or all of the DTA will not be realized. In assessing the realizability of the DTAs, management considers the scheduled reversals of DTLs, projected future taxable earnings and prudent and feasible tax planning strategies. Management weighs both the positive and negative evidence, giving more weight to evidence that can be objectively verified. The income tax benefit or expense is the total of the current year income tax due or refundable and the change in DTAs and DTLs. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50 percent likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. United recognizes interest and / or penalties related to income tax matters in income tax expense.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities United’s interest rate risk management strategy incorporates the use of derivative instruments to minimize fluctuations in net income that are caused by interest rate volatility. The objective is to manage interest rate sensitivity by modifying the repricing or maturity characteristics of certain balance sheet assets and liabilities so that net interest revenue and certain interest sensitive components of noninterest revenue are not, on a material basis, adversely affected by movements in interest rates. United views this strategy as a prudent management of interest rate risk, such that net income is not exposed to undue risk presented by changes in interest rates. In carrying out this part of its interest rate risk management strategy, management uses derivatives, primarily interest rate swaps. Interest rate swaps generally involve the exchange of fixed- and variable-rate interest payments between two parties, based on a common notional principal amount and maturity date. United has also occasionally used interest rate caps to serve as an economic macro hedge of exposure to rising interest rates. United originates certain residential mortgage loans with the intention of selling these loans. Between the time United enters into an interest-rate lock commitment to originate a residential mortgage loan that is to be held for sale and the time the loan is funded and eventually sold, the Company is subject to the risk of variability in market prices. United enters into forward sale agreements to mitigate risk and to protect the expected gain on the eventual loan sale. The commitments to originate residential mortgage loans and forward loan sales commitments are freestanding derivative instruments which are entered into as part of an economic hedging strategy to manage exposure related to mortgage loans held for sale. To accommodate customers, United enters into interest rate swaps, caps or collars with certain commercial loan customers, with offsetting positions to dealers under a back-to-back swap/cap/collar program. In addition, United occasionally enters into credit risk participation agreements with counterparty banks to accept a portion of the credit risk related to interest rate swaps. This allows customers to execute an interest rate swap with one bank while allowing for the distribution of the credit risk among participating members. Credit risk participation agreements arise when United contracts with other financial institutions, as a guarantor, to share credit risk associated with certain interest rate swaps. These agreements provide for reimbursement of losses resulting from a third party default on the underlying swap. These transactions are typically executed in conjunction with a participation in a loan with the same customer. Collateral used to support the credit risk for the underlying lending relationship is also available to offset the risk of the credit risk participation. United classifies its derivative financial instruments as either (1) a hedge of an exposure to changes in the fair value of a recorded asset or liability (“fair value hedge”), (2) a hedge of an exposure to changes in the cash flows of a recognized asset, liability or forecasted transaction (“cash flow hedge”), or (3) derivatives not designated as accounting hedges. Changes in the fair value of derivatives not designated as hedges are recognized in current period earnings. United has master netting agreements with the derivatives dealers with which it does business, but reflects gross assets and liabilities at fair value on the consolidated balance sheets. United assesses hedge effectiveness at inception and over the life of the hedge. Management documents, at inception, its analysis of actual and expected hedge effectiveness. This analysis includes techniques such as regression analysis and hypothetical derivatives to demonstrate that the hedge is expected to be highly effective in offsetting corresponding changes in the fair value or cash flows of the hedged item. At least quarterly thereafter, the terms of the hedging instrument and the hedged item are assessed to determine whether a material change has occurred relating to the hedge relationship. If it is determined that a change has occurred, a quantitative analysis as described will occur to determine whether the hedge is expected to be highly effective in offsetting future corresponding changes in the fair value or cash flows of the hedged item. For a qualifying fair value hedge, the changes in the value of derivatives are recognized in current period earnings along with the corresponding changes in the fair value of the designated hedged item attributable to the risk being hedged. For a qualifying cash flow hedge, the changes in the fair value of the derivatives that have been highly effective are recognized in other comprehensive income until the related cash flows from the hedged item are recognized in earnings. For fair value hedges and cash flow hedges, ineffectiveness is recognized in the same income statement line as interest accruals on the hedged item to the extent that changes in the value of the derivative instruments do not perfectly offset changes in the value of the hedged items. If the hedge ceases to be highly effective, United discontinues hedge accounting and recognizes the changes in fair value in current period earnings. If a derivative that qualifies as a fair value or cash flow hedge is terminated or the designation removed, the realized or then unrealized gain or loss is recognized into income over the life of the hedged item (fair value hedge) or over the time when the hedged item was forecasted to impact earnings (cash flow hedge). Immediate recognition in earnings is required upon sale or extinguishment of the hedged item (fair value hedge) or if it is probable that the hedged cash flows will not occur (cash flow hedge). By using derivative instruments, United is exposed to credit and market risk. If the counterparty fails to perform, credit risk is represented by the fair value gain in a derivative. When the fair value of a derivative contract is positive, this situation generally indicates that the counterparty is obligated to pay United, and, therefore, creates a repayment risk for United. When the fair value of a derivative contract is negative, United is obligated to pay the counterparty and, therefore, has no repayment risk. United minimizes the credit risk in non-customer derivative instruments by entering into transactions with high-quality counterparties that are reviewed periodically by management. United also requires non-customer counterparties to pledge cash as collateral to cover the net exposure. All new non-customer derivatives that can be cleared are cleared through a central clearinghouse, which reduces counterparty exposure. Derivative activities are monitored by the ALCO as part its oversight of asset/liability and treasury functions. The ALCO is responsible for implementing various hedging strategies that are developed through its analysis of data from financial simulation
Acquisition Activities	Acquisition Activities United accounts for business combinations under the acquisition method of accounting. Assets acquired and liabilities assumed are measured and recorded at fair value at the date of acquisition, including identifiable intangible assets. If the fair value of net assets purchased exceeds the fair value of consideration paid, a bargain purchase gain is recognized at the date of acquisition. Conversely, if the consideration paid exceeds the fair value of the net assets acquired, goodwill is recognized at the acquisition date. Fair values are subject to refinement for a period not to exceed one year after the closing date of an acquisition as information relative to closing date fair values becomes available. Fair values for acquired loans are generally based on a discounted cash flow methodology that considers credit loss expectations, market interest rates and other market factors such as liquidity from the perspective of a market participant. Loans are grouped together according to similar characteristics and are generally treated in the aggregate when applying various valuation techniques. The probability of default, loss given default and prepayment assumptions are the key factors driving credit losses which are embedded into the estimated cash flows. These assumptions are informed by internal data on loan characteristics, historical loss experience, and current and forecasted economic conditions. The interest and liquidity component of the estimate is determined by discounting interest and principal cash flows through the expected life of each loan. The discount rates used for loans are based on current market rates for new originations of comparable loans and include adjustments for liquidity. The discount rate does not include a factor for credit losses as that has been included as a reduction to the estimated cash flows. For additional information about the accounting for purchased loans see PCD Loans (CECL) under the Loans and Leases section of this footnote. All identifiable intangible assets that are acquired in a business combination are recognized at fair value on the acquisition date. Identifiable intangible assets are recognized separately if they arise from contractual or other legal rights or if they are separable (i.e., capable of being sold, transferred, licensed, rented, or exchanged separately from the entity). Deposit liabilities and the related depositor relationship intangible assets may be exchanged in observable exchange transactions. As a result, the depositor relationship intangible asset is considered identifiable, because the separability criterion has been met.
Earnings Per Common Share	Earnings Per Common ShareBasic earnings per common share is net income available to common shareholders divided by the weighted average number of shares of common stock outstanding during the period. All outstanding unvested share-based payment awards that contain rights to nonforfeitable dividends are considered participating securities for this calculation. Additionally, shares issuable to participants in United’s deferred compensation plan are considered to be participating securities for purposes of calculating basic earnings per share. Accordingly, net income available to common shareholders is calculated pursuant to the two-class method, whereby net income after subtracting preferred stock dividends is allocated between common shareholders and participating securities. Diluted earnings per common share includes the dilutive effect of additional potential shares of common stock issuable under stock options, unvested restricted stock units without nonforfeitable rights to dividends, warrants and securities convertible into common stock.
Loss Contingencies	Loss ContingenciesLoss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are such matters that will have a material effect on the financial statements.
Dividend Restrictions	Dividend RestrictionsBanking regulations require maintaining certain capital levels and may limit dividends paid by the Bank to the Holding Company or by the Holding Company to shareholders. As a South Carolina state-chartered bank, the Bank is permitted to pay a dividend of up to 100% of its current year earnings without requesting approval of the SCBFI, provided certain conditions are met. Prior to July 1, 2021, as a Georgia state-chartered bank, the Board could declare dividends from the Bank to the Holding Company out of retained earnings of up to fifty percent of the Bank’s net income from the previous year without notifying or seeking approval from the GADBF, provided certain conditions were met.
Fair Value of Financial Instruments	Fair Value of Financial InstrumentsFair values of financial instruments are estimated using relevant market information and other assumptions as more fully disclosed in Note 14. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect these estimates. Fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, United uses a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). United has processes in place to review the significant valuation inputs and to reassess how the instruments are classified in the valuation framework. Fair Value Hierarchy Level 1 Valuation is based upon quoted prices (unadjusted) in active markets for identical assets or liabilities that United has the ability to access. Level 2 Valuation is based upon quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 Valuation is generated from model-based techniques that use at least one significant assumption based on unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. United’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. The following is a description of the valuation methodologies used for assets and liabilities recorded at fair value. Investment Securities AFS debt securities and equity securities with readily determinable fair values are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities include mortgage-backed securities issued by government sponsored entities, municipal bonds, corporate debt securities and asset-backed securities and are valued based on observable inputs that include: quoted market prices for similar assets, quoted market prices that are not in an active market or other inputs that are observable in the market and can be corroborated by observable market data for substantially the full term of the securities. Securities classified as Level 3 include those traded in less liquid markets and are valued based on estimates obtained from broker-dealers that are not directly observable. Deferred Compensation Plan Assets and Liabilities Included in other assets in the consolidated balance sheets are assets related to employee deferred compensation plans. The assets associated with these plans are invested in mutual funds and classified as Level 1. Deferred compensation liabilities, also classified as Level 1, are carried at the fair value of the obligation to the employee, which mirrors the fair value of the invested assets and is included in other liabilities in the consolidated balance sheets. Mortgage Loans Held for Sale United has elected the fair value option for newly originated mortgage loans held for sale in order to reduce certain timing differences and better match changes in fair values of the loans with changes in the value of derivative instruments used to economically hedge them. The fair value of mortgage loans held for sale is determined using quoted prices for a similar asset, adjusted for specific attributes of that loan and are classified as Level 2. Derivative Financial Instruments United uses derivatives to manage interest rate risk. The valuation of these instruments is typically determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments. The variable cash payments are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. United also uses best effort and mandatory delivery forward loan sale commitments to hedge risk in its mortgage lending business. United incorporates credit valuation adjustments (“CVAs”) as necessary to appropriately reflect the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, United has considered the effect of netting and any applicable credit enhancements, such as collateral postings, thresholds and guarantees. Management has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy. However, the CVAs associated with these derivatives utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by itself and its counterparties. Generally, management’s assessment of the significance of the CVAs has indicated that they are not a significant input to the overall valuation of the derivatives. In cases where management’s assessment indicates that the CVA is a significant input, the related derivative is disclosed as a Level 3 value. Other derivatives classified as Level 3 include structured derivatives for which broker quotes, used as a key valuation input, were not observable. Risk participation agreements are classified as Level 3 instruments due to the incorporation of significant Level 3 inputs used to evaluate the probability of funding and the likelihood of customer default. Interest rate lock commitments, which relate to mortgage loan commitments, are categorized as Level 3 instruments as the fair value of these instruments is based on unobservable inputs for commitments that United does not expect to fund. Servicing Rights for Residential Mortgage and SBA/USDA Loans United recognizes servicing rights upon the sale of residential mortgage and SBA/USDA loans sold with servicing retained. Management has elected to carry these assets at fair value. Given the nature of the assets, the key valuation inputs are unobservable and management considers these Level 3 assets. For disclosure regarding the fair value of servicing rights, see Note 10.
Stock-Based Compensation	Stock-Based CompensationUnited uses the fair value method of recognizing expense for stock-based compensation based on the fair value of option and restricted stock unit awards at the date of grant. United accounts for forfeitures as they occur.
Accounting Standards Updates and Recently Adopted Standards	Recently Adopted Standards In August 2021, the FASB issued ASU No. 2021-06, Presentation of Financial Statements (Topic 205), Financial Services - Depository and Lending (Topic 942) and Financial Services - Investment Companies (Topic 946): August 2021 Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants . Among other things, this update eliminates redundancies for items covered elsewhere in GAAP, such as loan category presentation. United adopted this update immediately, with no material impact on the consolidated financial statements. In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements . In addition to consolidating existing disclosure guidance into a single codification section to reduce the likelihood of a required disclosure being missed, this update clarifies the application of select guidance in cases where the original guidance may have been unclear. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In October 2020, the FASB issued ASU No. 2020-08, Codification Improvements to Subtopic 310-20, Receivables—Nonrefundable Fees and Other Costs . This update clarifies that an entity should reevaluate whether a callable debt security meets the criteria to adjust the amortization period of any related premium at each reporting period. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In January 2020, the FASB issued ASU No. 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 (a consensus of the Emerging Issues Task Force) . This update clarifies whether an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative and how to account for certain forward contracts and purchased options to purchase securities. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes . This update removes several exceptions related to intraperiod tax allocation when there is a loss from continuing operations and income from other items, foreign subsidiaries becoming equity method investments and vice versa, and calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The guidance also amends requirements related to franchise tax that is partially based on income, a step up in the tax basis of goodwill, allocation of consolidated tax expense to a legal entity not subject to tax in its separate financial statements, the effects of enacted changes in tax laws and other minor codification improvements regarding employee stock ownership plans and investments in qualified affordable housing projects. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans . The update removes disclosures that are no longer considered cost beneficial, clarifies specific requirements of disclosures, and adds disclosure requirements identified as relevant. United adopted this update as of January 1, 2021, with no material impact on the consolidated financial statements. Accounting Standards Updates Not Yet Adopted as of December 31, 2021 In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from contracts with Customers . The update requires that an acquiring entity apply the guidance from Revenue from Contracts with Customers (Topic 606) to recognize and measure contract assets and contract liabilities in a business combination, rather than fair value. For public entities, this guidance is effective for fiscal years beginning after December 15, 2022, with early adoption permitted, and requires prospective application. United does not expect the new guidance to have a material impact on the consolidated financial statements. In July 2021, the FASB issued ASU No. 2021-05, Leases (Topic 842): Lessors - Certain Leases with Variable Lease Payments . The update amends the lease classification requirements for lessors to align them with practice under the former lease accounting standard. Specifically, lessors should classify a lease with variable lease payments that do not depend on a reference index or rate as an operating lease if certain criteria are met. Adoption of this update as of January 1, 2022 did not have a material impact on the consolidated financial statements.

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2021
Business Acquisition [Line Items]
Schedule of actual results and pro forma information	The following table presents the actual results and pro forma information for the periods indicated (in thousands) . (Unaudited) Year Ended December 31, Revenue Net Income 2021 Actual Aquesta results included in statement of income since acquisition date $ 2,122 $ (282) Actual FinTrust results included in statement of income since acquisition date 4,326 (26) Supplemental consolidated pro forma as if Aquesta and FinTrust had been acquired January 1, 2020 771,289 279,568 2020 Actual Three Shores results included in statement of income since acquisition date $ 24,541 $ 6,800 Supplemental consolidated pro forma as if Aquesta and FinTrust had been acquired January 1, 2020 and Three Shores had been acquired January 1, 2019 622,848 164,284 2019 Actual FMBT results included in statement of income since acquisition date $ 7,525 $ 4,053 Supplemental consolidated pro forma as if Three Shores had been acquired on January 1, 2019 and FMBT had been acquired January 1, 2018 636,079 210,232
Aquesta
Business Acquisition [Line Items]
Schedule of purchased assets and assumed liabilities and supplementary information	The following table presents purchased assets and assumed liabilities recorded at their acquisition date fair values and consideration transferred as well as supplementary information related to the acquired loan portfolio at the acquisition date (in thousands) . Aquesta Fair Value Recorded by United October 1, 2021 Assets Cash and cash equivalents $ 153,091 Debt securities 60,762 Loans 498,312 Premises and equipment 18,112 BOLI 12,540 Accrued interest receivable 1,419 Net deferred tax asset 2,129 Core deposit intangible 2,030 Other assets 7,553 Total assets acquired 755,948 Liabilities Deposits 657,724 FHLB advances 24,509 Other liabilities 12,084 Total liabilities assumed 694,317 Total identifiable net assets 61,631 Consideration transferred Cash 40,542 Common stock issued (2,731,435 shares) 89,646 Option and warrant equity instruments converted 1,478 Total fair value of consideration transferred 131,666 Goodwill $ 70,035 Supplementary Information on Acquired Loans October 1, 2021 PCD loans: Par Value $ 75,579 ACL at acquisition (3,544) Non-credit discount (692) Purchase price $ 71,343 Non-PCD loans: Fair value $ 426,969 Gross contractual amounts receivable 482,737 Estimate of contractual cash flows not expected to be collected 3,399
Three Shores
Business Acquisition [Line Items]
Schedule of purchased assets and assumed liabilities and supplementary information	The following table presents purchased assets and assumed liabilities recorded at their acquisition date fair values and consideration transferred as well as supplementary information related to the acquired loan portfolio at the acquisition date (in thousands) Three Shores Fair Value Recorded by United July 1, 2020 Assets Cash and cash equivalents $ 219,807 Debt securities 381,740 Loans 1,427,966 Premises and equipment 1,584 Accrued interest receivable 7,681 Derivative assets 11,800 Net deferred tax asset 15,061 Core deposit intangible 3,360 Other assets 65,340 Total assets acquired 2,134,339 Liabilities Deposits 1,802,694 FHLB advances and long-term debt 144,121 Derivative liabilities 12,165 Other liabilities 28,046 Total liabilities assumed 1,987,026 Total identifiable net assets 147,313 Consideration transferred Cash 24,108 Common stock issued (8,130,633 shares) 163,589 Total fair value of consideration transferred 187,697 Goodwill $ 40,384 Supplementary Information on Acquired Loans July 1, 2020 PCD loans: Par Value $ 283,137 ACL at acquisition (11,152) Non-credit discount (8,694) Purchase price $ 263,291 Non-PCD loans: Fair value $ 1,164,675 Gross contractual amounts receivable 1,358,793 Estimate of contractual cash flows not expected to be collected 76,503

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Schedule of Supplemental Cash Flow Information	The supplemental schedule of cash and noncash activities for the periods indicated is as follows (in thousands) . 2021 2020 2019 Cash paid during the period for: Interest $ 32,000 $ 59,967 $ 85,973 Income taxes paid 55,754 36,536 33,776 Significant non-cash investing and financing transactions: Transfers of loans to foreclosed properties 1,849 822 1,173 Unsettled sales of government guaranteed loans — — 8,194 Acquisitions: Assets acquired 848,806 2,174,723 264,937 Liabilities assumed 695,420 1,987,026 212,844 Net assets acquired 153,386 187,697 52,093 Value of common stock issued 94,046 163,589 — Other non-cash consideration (1) 9,178 — — (1) See Note 3, Acquisitions, for further detail.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost basis, unrealized gains and losses and fair value of HTM debt securities	The cost basis, unrealized gains and losses, and fair value of HTM debt securities as of the dates indicated are as follows (in thousands) : Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value As of December 31, 2021 U.S. Treasuries $ 19,803 $ 20 $ — $ 19,823 U.S. Government agencies & GSEs 70,180 — 1,121 69,059 State and political subdivisions 257,688 4,341 4,080 257,949 Residential MBS, Agency & GSE 381,641 2,021 3,687 379,975 Commercial MBS, Agency & GSE 411,786 4,106 8,915 406,977 Supranational entities 15,000 21 — 15,021 Total $ 1,156,098 $ 10,509 $ 17,803 $ 1,148,804 As of December 31, 2020 U.S. Government agencies & GSEs $ 10,575 $ 26 $ 11 $ 10,590 State and political subdivisions 197,723 7,658 242 205,139 Residential MBS, Agency & GSE 113,400 4,774 1 118,173 Commercial MBS, Agency & GSE 98,663 4,874 246 103,291 Total $ 420,361 $ 17,332 $ 500 $ 437,193
Schedule of amortized cost basis, unrealized gains and losses, and fair value of AFS debt securities	The cost basis, unrealized gains and losses, and fair value of AFS debt securities as of the dates indicated are as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value As of December 31, 2021 U.S. Treasuries $ 218,027 $ 1,661 $ 2,168 $ 217,520 U.S. Government agencies & GSEs 189,855 605 3,428 187,032 State and political subdivisions 263,269 15,237 2,662 275,844 Residential MBS, Agency & GSE 2,079,700 9,785 28,521 2,060,964 Residential MBS, Non-agency 81,925 2,249 4 84,170 Commercial MBS, Agency & GSE 870,563 2,974 16,156 857,381 Commercial MBS, Non-agency 15,202 1,268 — 16,470 Corporate bonds 194,164 814 1,812 193,166 Asset-backed securities 603,824 2,000 1,547 604,277 Total $ 4,516,529 $ 36,593 $ 56,298 $ 4,496,824 As of December 31, 2020 U.S. Treasuries $ 123,677 $ 4,395 $ — $ 128,072 U.S. Government agencies & GSEs 152,596 701 325 152,972 State and political subdivisions 253,630 20,891 49 274,472 Residential MBS, Agency & GSE 1,275,551 29,107 766 1,303,892 Residential MBS, Non-agency 174,322 7,499 128 181,693 Commercial MBS, Agency & GSE 524,852 8,013 597 532,268 Commercial MBS, Non-agency 15,350 1,513 — 16,863 Corporate bonds 70,057 1,711 1 71,767 Asset-backed securities 562,076 1,278 632 562,722 Total $ 3,152,111 $ 75,108 $ 2,498 $ 3,224,721
Schedule of HTM debt securities in an unrealized loss position	The following summarizes HTM debt securities in an unrealized loss position as of the dates indicated (in thousands) : Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized As of December 31, 2021 U.S. Government agencies & GSEs $ 64,658 $ 888 $ 4,401 $ 233 $ 69,059 $ 1,121 State and political subdivisions 131,128 3,590 9,006 490 140,134 4,080 Residential MBS, Agency & GSE 289,132 3,687 — — 289,132 3,687 Commercial MBS, Agency & GSE 314,049 8,540 10,384 375 324,433 8,915 Total unrealized loss position $ 798,967 $ 16,705 $ 23,791 $ 1,098 $ 822,758 $ 17,803 As of December 31, 2020 U.S. Government agencies & GSEs $ 4,677 $ 11 $ — $ — $ 4,677 $ 11 State and political subdivisions 14,870 242 — — 14,870 242 Residential MBS, Agency & GSE 999 1 — — 999 1 Commercial MBS, Agency & GSE 24,956 236 1,352 10 26,308 246 Total unrealized loss position $ 45,502 $ 490 $ 1,352 $ 10 $ 46,854 $ 500
Schedule of AFS debt securities in an unrealized loss position	The following summarizes AFS debt securities in an unrealized loss position as of the dates indicated (in thousands) : Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized As of December 31, 2021 U.S. Treasuries $ 111,606 $ 2,168 $ — $ — $ 111,606 $ 2,168 U.S. Government agencies & GSEs 132,893 2,591 20,093 837 152,986 3,428 State and political subdivisions 69,302 2,581 3,148 81 72,450 2,662 Residential MBS, Agency & GSE 1,534,744 25,799 74,481 2,722 1,609,225 28,521 Residential MBS, Non-agency 12,608 4 — — 12,608 4 Commercial MBS, Agency & GSE 582,235 13,098 66,014 3,058 648,249 16,156 Corporate bonds 149,246 1,811 16 1 149,262 1,812 Asset-backed securities 195,164 1,546 571 1 195,735 1,547 Total unrealized loss position $ 2,787,798 $ 49,598 $ 164,323 $ 6,700 $ 2,952,121 $ 56,298 As of December 31, 2020 U.S. Government agencies & GSEs $ 27,952 $ 324 $ 607 $ 1 $ 28,559 $ 325 State and political subdivisions 9,402 49 — — 9,402 49 Residential MBS, Agency & GSE 232,199 766 — — 232,199 766 Residential MBS, Non-agency 2,331 128 — — 2,331 128 Commercial MBS, Agency & GSE 89,918 597 — — 89,918 597 Corporate bonds 1,410 1 — — 1,410 1 Asset-backed securities 87,305 28 53,587 604 140,892 632 Total unrealized loss position $ 450,517 $ 1,893 $ 54,194 $ 605 $ 504,711 $ 2,498
Schedule of accrued interest receivable	The following table presents accrued interest receivable for the periods indicated on HTM and AFS debt securities (in thousands) , which was excluded from the estimate of credit losses. Accrued Interest Receivable December 31, 2021 December 31, 2020 HTM $ 3,596 $ 1,784 AFS 9,868 9,114
Schedule of AFS securities sales activity	Realized gains and losses are derived using the specific identification method for determining the cost of the securities sold. The following summarizes securities sales activities for the years ended December 31 (in thousands) : 2021 2020 2019 Proceeds from sales $ 288,986 $ 40,625 $ 352,106 Gross gains on sales $ 2,346 $ 748 $ 1,843 Gross losses on sales (2,263) — (2,864) Net gains (losses) on sales of securities $ 83 $ 748 $ (1,021) Income tax expense (benefit) attributable to sales $ (46) $ 191 $ (247)
Schedule of amortized cost and fair value of AFS and HTM securities by contractual maturity	The amortized cost and fair value of AFS and HTM debt securities at December 31, 2021, by contractual maturity, are presented in the following table (in thousands). Expected maturities may differ from contractual maturities because issuers and borrowers may have the right to call or prepay obligations. AFS HTM Amortized Cost Fair Value Amortized Cost Fair Value Within 1 year: U.S. Treasuries $ 54,974 $ 55,418 $ — $ — U.S. Government agencies & GSEs 87 87 — — State and political subdivisions 15,008 15,247 5,200 5,324 Corporate bonds 2,657 2,657 — — 72,726 73,409 5,200 5,324 1 to 5 years: U.S. Treasuries 74,101 74,800 — — U.S. Government agencies & GSEs 22,946 22,798 — — State and political subdivisions 33,290 34,711 8,762 9,548 Corporate bonds 100,553 99,958 — — 230,890 232,267 8,762 9,548 5 to 10 years: U.S. Treasuries 88,952 $ 87,302 $ 19,803 $ 19,823 U.S. Government agencies & GSEs 79,812 77,606 31,962 31,578 State and political subdivisions 135,265 140,348 38,188 38,784 Corporate bonds 90,169 89,657 — — Supranational entities — — 15,000 15,021 394,198 394,913 104,953 105,206 More than 10 years: U.S. Government agencies & GSEs 87,010 86,541 38,218 37,481 State and political subdivisions 79,706 85,538 205,538 204,293 Corporate bonds 785 894 — — 167,501 172,973 243,756 241,774 Debt securities not due at a single maturity: Asset-backed securities 603,824 604,277 — — Residential MBS 2,161,625 2,145,134 381,641 379,975 Commercial MBS 885,765 873,851 411,786 406,977 Total $ 4,516,529 $ 4,496,824 $ 1,156,098 $ 1,148,804

Loans and Leases and Allowanc_2

Loans and Leases and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Schedule of major classifications of loan and lease portfolio	Major classifications of the loan and lease portfolio (collectively referred to as the “loan portfolio” or “loans”) are summarized as of the dates indicated as follows (in thousands) : December 31, 2021 2020 Owner occupied commercial real estate $ 2,321,685 $ 2,090,443 Income producing commercial real estate 2,600,858 2,540,750 Commercial & industrial (1) 1,910,162 2,498,560 Commercial construction 1,014,830 967,305 Equipment financing 1,083,021 863,830 Total commercial 8,930,556 8,960,888 Residential mortgage 1,637,885 1,284,920 HELOC 694,034 697,117 Residential construction 359,815 281,430 Consumer 138,056 146,460 Total loans 11,760,346 11,370,815 Less ACL - loans (102,532) (137,010) Loans, net $ 11,657,814 $ 11,233,805
Schedule of loans sold	The following table presents loans held for investment that were sold in the periods presented (in thousands). The gains and losses on these loan sales were included in noninterest income on the consolidated statements of income. Loans Sold 2021 2020 2019 Guaranteed portion of SBA/USDA loans $ 90,903 $ 48,385 $ 81,158 Equipment financing receivables 59,097 27,018 30,952 Indirect auto loans — — 102,789 Total $ 150,000 $ 75,403 $ 214,899
Schedule of components of net investment in leases	At December 31, 2021 and 2020, equipment financing assets included leases of $37.7 million and $36.8 million, respectively. The components of the net investment in leases, which included both sales-type and direct financing, are presented below (in thousands) . December 31, 2021 2020 Minimum future lease payments receivable $ 39,962 $ 38,934 Estimated residual value of leased equipment 3,216 3,263 Initial direct costs 669 672 Security deposits (687) (727) Purchase accounting premium — 117 Unearned income (5,432) (5,457) Net investment in leases $ 37,728 $ 36,802
Schedule of minimum future lease payments expected to be received from equipment financing lease contracts	Minimum future lease payments expected to be received from equipment financing lease contracts as of December 31, 2021 were as follows (in thousands) : Year 2022 $ 15,667 2023 11,601 2024 7,100 2025 4,136 2026 1,369 Thereafter 89 Total $ 39,962
Schedule of loans by aging category and accrual status	The following table presents the amortized cost basis in loans by aging category and accrual status as of December 31, 2021 and 2020 (in thousands). Loans with active COVID-19 deferrals are not reported as past due to the extent they are in compliance with the deferral terms. Accruing Loans Past Due Current Loans 30 - 59 Days 60 - 89 Days > 90 Days Nonaccrual Loans Total Loans As of December 31, 2021 Owner occupied commercial real estate $ 2,318,944 $ 27 $ — $ — $ 2,714 $ 2,321,685 Income producing commercial real estate 2,593,124 146 — — 7,588 2,600,858 Commercial & industrial 1,903,730 584 419 — 5,429 1,910,162 Commercial construction 1,014,211 — 276 — 343 1,014,830 Equipment financing 1,079,180 1,415 685 — 1,741 1,083,021 Total commercial 8,909,189 2,172 1,380 — 17,815 8,930,556 Residential mortgage 1,622,754 1,583 235 — 13,313 1,637,885 HELOC 691,814 920 88 — 1,212 694,034 Residential construction 358,741 654 — — 420 359,815 Consumer 137,564 421 19 — 52 138,056 Total loans $ 11,720,062 $ 5,750 $ 1,722 $ — $ 32,812 $ 11,760,346 As of December 31, 2020 Owner occupied commercial real estate $ 2,079,845 $ 2,013 $ 3 $ — $ 8,582 $ 2,090,443 Income producing commercial real estate 2,522,743 1,608 1,250 — 15,149 2,540,750 Commercial & industrial 2,480,483 1,176 267 — 16,634 2,498,560 Commercial construction 964,947 231 382 — 1,745 967,305 Equipment financing 856,985 2,431 1,009 — 3,405 863,830 Total commercial 8,905,003 7,459 2,911 — 45,515 8,960,888 Residential mortgage 1,265,019 5,549 1,494 — 12,858 1,284,920 HELOC 692,504 1,942 184 — 2,487 697,117 Residential construction 280,551 365 — — 514 281,430 Consumer 145,770 429 36 — 225 146,460 Total loans $ 11,288,847 $ 15,744 $ 4,625 $ — $ 61,599 $ 11,370,815
Schedule of nonaccrual loans by loan class	The following table presents nonaccrual loans by loan class for the periods indicated (in thousands) . Nonaccrual loans December 31, 2021 December 31, 2020 With no allowance With an allowance Total With no allowance With an allowance Total Owner occupied commercial real estate $ 2,141 $ 573 $ 2,714 $ 6,614 $ 1,968 $ 8,582 Income producing commercial real estate 6,873 715 7,588 10,008 5,141 15,149 Commercial & industrial 3,715 1,714 5,429 2,004 14,630 16,634 Commercial construction — 343 343 1,339 406 1,745 Equipment financing — 1,741 1,741 156 3,249 3,405 Total commercial 12,729 5,086 17,815 20,121 25,394 45,515 Residential mortgage 3,126 10,187 13,313 1,855 11,003 12,858 HELOC 219 993 1,212 1,329 1,158 2,487 Residential construction 280 140 420 274 240 514 Consumer 6 46 52 181 44 225 Total $ 16,360 $ 16,452 $ 32,812 $ 23,760 $ 37,839 $ 61,599
Schedule of risk category of term loans by vintage year	The following tables present the risk category of term loans by vintage year, which is the year of origination or most recent renewal, as of the date indicated (in thousands). Term Loans Revolvers Revolvers converted to term loans Total As of December 31, 2021 2021 2020 2019 2018 2017 Prior Pass Owner occupied commercial real estate $ 643,151 $ 674,124 $ 278,702 $ 153,233 $ 139,584 $ 267,460 $ 68,354 $ 17,150 $ 2,241,758 Income producing commercial real estate 668,322 678,487 333,911 221,218 165,563 219,459 41,157 11,830 2,339,947 Commercial & industrial 638,567 270,150 178,944 136,281 50,567 72,904 514,750 4,361 1,866,524 Commercial construction 378,695 303,154 149,740 40,625 22,983 13,206 12,628 1,673 922,704 Equipment financing 563,618 271,913 167,904 63,254 13,145 903 — — 1,080,737 Total commercial 2,892,353 2,197,828 1,109,201 614,611 391,842 573,932 636,889 35,014 8,451,670 Residential mortgage 781,007 370,092 108,091 64,346 71,552 221,131 9 3,915 1,620,143 HELOC — — — — — — 676,545 14,994 691,539 Residential construction 325,111 16,301 2,802 2,278 3,144 9,352 — 33 359,021 Consumer 57,530 29,218 10,757 5,137 1,439 1,355 32,312 111 137,859 4,056,001 2,613,439 1,230,851 686,372 467,977 805,770 1,345,755 54,067 11,260,232 Special Mention Owner occupied commercial real estate 7,772 2,979 16,639 4,374 6,007 2,641 248 286 40,946 Income producing commercial real estate 64,139 27,875 21,875 22,292 18,415 21,880 — — 176,476 Commercial & industrial 1,037 1,831 2,740 597 273 303 2,242 — 9,023 Commercial construction 14,283 16,237 13,149 22,479 11,766 52 — — 77,966 Equipment financing — — — — — — — — — Total commercial 87,231 48,922 54,403 49,742 36,461 24,876 2,490 286 304,411 Residential mortgage — — — — — — — — — HELOC — — — — — — — — — Residential construction — — — — — — — — — Consumer — — — — — — — — — 87,231 48,922 54,403 49,742 36,461 24,876 2,490 286 304,411 Substandard Owner occupied commercial real estate 11,987 1,049 4,216 3,712 5,829 11,088 — 1,100 38,981 Income producing commercial real estate 15,485 12,618 3,779 29,212 6,726 16,531 — 84 84,435 Commercial & industrial 2,741 1,615 5,284 12,685 1,232 5,863 4,326 869 34,615 Commercial construction 3,464 157 272 11 9,750 255 — 251 14,160 Equipment financing 428 590 676 503 84 3 — — 2,284 Total commercial 34,105 16,029 14,227 46,123 23,621 33,740 4,326 2,304 174,475 Residential mortgage 3,339 1,585 2,813 3,229 1,205 4,744 — 827 17,742 HELOC — — — — — — 329 2,166 2,495 Residential construction 407 — 30 51 — 306 — — 794 Consumer 37 16 22 26 22 50 3 21 197 37,888 17,630 17,092 49,429 24,848 38,840 4,658 5,318 195,703 Total $ 4,181,120 $ 2,679,991 $ 1,302,346 $ 785,543 $ 529,286 $ 869,486 $ 1,352,903 $ 59,671 $ 11,760,346 Term Loans Revolvers Revolvers converted to term loans Total As of December 31, 2020 2020 2019 2018 2017 2016 Prior Pass Owner occupied commercial real estate $ 707,501 $ 368,615 $ 231,316 $ 197,778 $ 201,362 $ 229,667 $ 56,273 $ 9,072 $ 2,001,584 Income producing commercial real estate 815,799 376,911 361,539 277,769 206,068 198,080 28,542 12,128 2,276,836 Commercial & industrial 1,092,767 287,857 263,439 115,790 92,968 58,359 515,593 3,777 2,430,550 Commercial construction 314,154 217,643 226,308 53,708 30,812 21,985 20,278 3,947 888,835 Equipment financing 413,653 270,664 125,869 39,982 9,404 445 — — 860,017 Total commercial 3,343,874 1,521,690 1,208,471 685,027 540,614 508,536 620,686 28,924 8,457,822 Residential mortgage 468,945 195,213 125,492 120,944 122,013 230,771 18 5,393 1,268,789 HELOC — — — — — — 675,878 17,581 693,459 Residential construction 225,727 30,646 4,026 4,544 3,172 12,546 — 64 280,725 Consumer 54,997 25,528 14,206 4,531 3,595 1,677 41,445 76 146,055 4,093,543 1,773,077 1,352,195 815,046 669,394 753,530 1,338,027 52,038 10,846,850 Special Mention Owner occupied commercial real estate 8,759 4,088 4,221 10,025 11,138 4,728 100 — 43,059 Income producing commercial real estate 35,471 42,831 39,954 13,238 24,164 11,337 — 1,681 168,676 Commercial & industrial 1,451 16,315 2,176 630 459 17 6,464 — 27,512 Commercial construction 21,366 272 816 23,292 11,775 477 — — 57,998 Equipment financing — — — — — — — — — Total commercial 67,047 63,506 47,167 47,185 47,536 16,559 6,564 1,681 297,245 Residential mortgage — — — — — — — — — HELOC — — — — — — — — — Residential construction — — — — — — — — — Consumer — — — — — — — — — 67,047 63,506 47,167 47,185 47,536 16,559 6,564 1,681 297,245 Substandard Owner occupied commercial real estate 6,586 10,473 7,596 3,717 6,753 8,473 1,528 674 45,800 Income producing commercial real estate 45,125 8,940 2,179 5,034 31,211 2,652 — 97 95,238 Commercial & industrial 1,545 5,536 6,193 1,684 1,292 1,485 22,170 593 40,498 Commercial construction 2,466 735 13,741 340 1,931 250 — 1,009 20,472 Equipment financing 631 1,392 1,371 306 96 17 — — 3,813 Total commercial 56,353 27,076 31,080 11,081 41,283 12,877 23,698 2,373 205,821 Residential mortgage 2,049 2,106 3,174 1,369 679 5,860 — 894 16,131 HELOC — — — — — — 265 3,393 3,658 Residential construction 106 37 54 4 124 380 — — 705 Consumer — 97 49 60 78 98 — 23 405 58,508 29,316 34,357 12,514 42,164 19,215 23,963 6,683 226,720 Total $ 4,219,098 $ 1,865,899 $ 1,433,719 $ 874,745 $ 759,094 $ 789,304 $ 1,368,554 $ 60,402 $ 11,370,815
Schedule of loans modified under the terms of a TDR, including TDR loans that defaulted	Loans modified under the terms of a TDR during the years ended December 31 are presented in the table below. In addition, the following table presents loans modified under the terms of a TDR that defaulted (became 90 days or more delinquent) during the years ended December 31 that were initially restructured within one year prior to default (dollars in thousands) : New TDRs Number of Post-Modification Outstanding Recorded Investment TDRs Modified Within the Year That Have Subsequently Defaulted Year Ended December 31, 2021 Rate Structure Other Total Number of Contracts Recorded Owner occupied commercial real estate 2 $ — $ 731 $ — $ 731 1 $ 99 Income producing commercial real estate 3 — — 1,697 1,697 — — Commercial & industrial 8 — 597 103 700 2 76 Commercial construction 1 — 309 — 309 — — Equipment financing 62 — 4,689 — 4,689 15 375 Total commercial 76 — 6,326 1,800 8,126 18 550 Residential mortgage 16 — 1,528 57 1,585 4 593 HELOC — — — — — 2 92 Residential construction — — — — — — — Consumer — — — — — — — Total 92 $ — $ 7,854 $ 1,857 $ 9,711 24 $ 1,235 Year Ended December 31, 2020 Owner occupied commercial real estate 8 $ — $ 833 $ 1,536 $ 2,369 — $ — Income producing commercial real estate 7 — 4,856 6,699 11,555 1 5,998 Commercial & industrial 4 — 586 15 601 3 819 Commercial construction 7 — 832 70 902 — — Equipment financing 172 — 5,821 5,821 22 944 Total commercial 198 — 12,928 8,320 21,248 26 7,761 Residential mortgage 40 — 4,359 3 4,362 2 145 HELOC 4 — 164 — 164 1 60 Residential construction 3 — 123 — 123 — — Consumer 7 — 11 24 35 1 3 Total 252 $ — $ 17,585 $ 8,347 $ 25,932 30 $ 7,969 Year Ended December 31, 2019 Owner occupied commercial real estate 4 $ — $ 1,739 $ — $ 1,739 — $ — Income producing commercial real estate 3 — 9,013 — 9,013 — — Commercial & industrial 2 — 75 7 82 — — Commercial construction — — — — — — — Equipment financing 9 — 1,071 — 1,071 — — Total commercial 18 — 11,898 7 11,905 — — Residential mortgage 15 — 2,057 — 2,057 1 135 HELOC 1 — 50 — 50 — — Residential construction 1 — — 21 21 1 13 Consumer 5 — — 45 45 — — Indirect auto 15 — — 262 262 — — Total 55 $ — $ 14,005 $ 335 $ 14,340 2 $ 148
Schedule of balance and activity in the ACL by portfolio segment	The following table presents the balance and activity in the ACL by portfolio segment for the periods indicated (in thousands) : CECL Year Ended December 31, 2021 Beginning Initial ACL- PCD loans (1) Charge-Offs Recoveries Provision Ending Owner occupied commercial real estate $ 20,673 $ 280 $ (1,640) $ 1,324 $ (6,355) $ 14,282 Income producing commercial real estate 41,737 982 (267) 496 (18,792) 24,156 Commercial & industrial 22,019 312 (4,776) 7,275 (8,238) 16,592 Commercial construction 10,952 1,969 (334) 1,081 (3,712) 9,956 Equipment financing 16,820 — (5,724) 2,619 2,575 16,290 Residential mortgage 15,341 — (344) 564 (3,171) 12,390 HELOC 8,417 1 (112) 517 (2,255) 6,568 Residential construction 764 — (10) 157 936 1,847 Consumer 287 — (2,066) 1,202 1,028 451 ACL - loans 137,010 3,544 (15,273) 15,235 (37,984) 102,532 ACL - unfunded commitments 10,558 — — — 434 10,992 Total ACL $ 147,568 $ 3,544 $ (15,273) $ 15,235 $ (37,550) $ 113,524 (1) Represents the initial ACL related to PCD loans acquired in the Aquesta transaction. Year Ended December 31, 2020 Dec. 31, 2019 Adoption of CECL Jan. 1, 2020 Initial ACL- PCD loans (1) Charge-Offs Recoveries Provision Ending Owner occupied commercial $ 11,404 $ (1,616) $ 9,788 $ 1,779 $ (70) $ 2,565 $ 6,611 $ 20,673 Income producing commercial 12,306 (30) 12,276 1,208 (8,430) 3,546 33,137 41,737 Commercial & industrial 5,266 4,012 9,278 7,680 (10,707) 1,371 14,397 22,019 Commercial construction 9,668 (2,583) 7,085 74 (726) 1,045 3,474 10,952 Equipment financing 7,384 5,871 13,255 — (8,764) 2,004 10,325 16,820 Residential mortgage 8,081 1,569 9,650 195 (398) 455 5,439 15,341 HELOC 4,575 1,919 6,494 209 (221) 677 1,258 8,417 Residential construction 2,504 (1,771) 733 — (93) 156 (32) 764 Consumer 901 (491) 410 7 (2,985) 2,259 596 287 ACL - loans 62,089 6,880 68,969 11,152 (32,394) 14,078 75,205 137,010 ACL - unfunded commitments 3,458 1,871 5,329 — — — 5,229 10,558 Total ACL $ 65,547 $ 8,751 $ 74,298 $ 11,152 $ (32,394) $ 14,078 $ 80,434 $ 147,568 (1) Represents the initial ACL related to PCD loans acquired in the Three Shores transaction. Incurred Loss Year Ended December 31, 2019 Beginning Charge-Offs Recoveries Provision Ending Owner occupied commercial real estate $ 12,207 $ (5) $ 375 $ (1,173) $ 11,404 Income producing commercial real estate 11,073 (1,227) 283 2,177 12,306 Commercial & industrial 4,802 (5,849) 852 5,461 5,266 Commercial construction 10,337 (290) 1,165 (1,544) 9,668 Equipment financing 5,452 (5,675) 781 6,826 7,384 Residential mortgage 8,295 (616) 481 (79) 8,081 HELOC 4,752 (996) 610 209 4,575 Residential construction 2,433 (306) 157 220 2,504 Consumer 853 (2,390) 911 1,527 901 Indirect auto 999 (663) 186 (522) — ACL - loans 61,203 (18,017) 5,801 13,102 62,089 ACL - unfunded commitments 3,410 — — 48 3,458 Total ACL $ 64,613 $ (18,017) $ 5,801 $ 13,150 $ 65,547

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Schedule of premises and equipment	Premises and equipment are summarized as follows as of the dates indicated (in thousands) : December 31, 2021 2020 Land and land improvements $ 95,029 $ 82,816 Buildings and improvements 189,339 173,497 Furniture and equipment 100,205 96,157 Construction in progress 10,088 7,590 394,661 360,060 Less accumulated depreciation (149,365) (141,571) Premises and equipment, net $ 245,296 $ 218,489

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of fair value of derivative financial instruments on consolidated balance sheet	The table below presents the fair value of derivative financial instruments as of the dates indicated as well as their classification on the consolidated balance sheets (in thousands) : December 31, 2021 December 31, 2020 Notional Amount Fair Value Notional Amount Fair Value Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Cash flow hedge of subordinated debt $ 100,000 $ 6,389 $ — $ 100,000 $ 3,378 $ — Cash flow hedge of trust preferred securities 20,000 — — 20,000 — — Fair value hedge of brokered CDs 10,000 — — 20,000 — — Total 130,000 6,389 — 140,000 3,378 — Derivatives not designated as hedging instruments: Customer derivative positions 1,206,145 28,656 10,663 1,329,271 72,508 17 Dealer offsets to customer derivative positions 1,230,885 974 9,232 1,329,271 1 24,614 Risk participations 69,385 16 7 48,843 28 12 Mortgage banking - loan commitment 110,897 3,450 — 253,243 10,751 — Mortgage banking - forward sales commitment 201,419 67 202 325,145 — 1,964 Bifurcated embedded derivatives 51,935 2,928 — 51,935 — 1,449 Dealer offsets to bifurcated embedded derivatives 51,935 — 5,041 51,935 — 947 Total 2,922,601 36,091 25,145 3,389,643 83,288 29,003 Total derivatives $ 3,052,601 $ 42,480 $ 25,145 $ 3,529,643 $ 86,666 $ 29,003 Total gross derivative instruments $ 42,480 $ 25,145 $ 86,666 $ 29,003 Less: Amounts subject to master netting agreements (694) (694) (114) (114) Less: Cash collateral received/pledged (6,620) (14,148) (3,200) (27,092) Net amount $ 35,166 $ 10,303 $ 83,352 $ 1,797
Schedule of effect of derivatives in hedging relationships consolidated statements of income	The table below presents the effect of derivatives in hedging relationships on the consolidated statements of income (in thousands) . Year Ended December 31, 2021 2020 2019 Total interest expense presented in the consolidated statements of income $ (29,760) $ (56,237) $ (83,312) Effect of hedging relationships on interest expense: Net income (expense) recognized on fair value hedges 210 281 (360) Net expense recognized on cash flow hedges (1) (2) (608) (359) — (1) Excludes 2019 amortization of losses related to de-designated cash flow hedges. See Note 17 for further detail. (2) Includes $472,000 and $329,000 of premium amortization expense excluded from the assessment of hedge effectiveness for the years ended December 31, 2021 and 2020 .
Schedule of carrying amount and cumulative fair value hedging adjustments on hedged liability	The table below presents the carrying amount of hedged fixed-rate brokered time deposits and cumulative fair value hedging adjustments included in the carrying amount of the hedged liability for the periods presented (in thousands) . December 31, 2021 2020 Balance Sheet Location Carrying amount of Assets (Liabilities) Hedge Accounting Basis Adjustment Carrying amount of Assets (Liabilities) Hedge Accounting Basis Adjustment Deposits $ (10,026) $ (28) $ (20,216) $ (235)
Schedule of gains and losses recognized in income on derivatives not designated as hedging instruments	The table below presents the gains and losses recognized in income on derivatives not designated as hedging instruments for the periods indicated (in thousands) . Income Statement Location Year Ended December 31, 2021 2020 2019 Customer derivatives and dealer offsets Other noninterest income $ 3,302 $ 6,732 $ 2,878 Bifurcated embedded derivatives and dealer offsets Other noninterest income 433 (63) 212 De-designated hedges Other noninterest income — — (193) Mortgage banking derivatives Mortgage loan revenue (1,805) (7,873) (1,797) Risk participations Other noninterest income (90) (340) (3) Total gains and losses $ 1,840 $ (1,544) $ 1,097

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of carrying amount of goodwill and other intangible assets	The carrying amount of goodwill and other intangible assets is summarized below as of the dates indicated (in thousands) : December 31, 2021 2020 Core deposit intangible $ 38,192 $ 36,162 Less: accumulated amortization (25,870) (22,148) Net core deposit intangible 12,322 14,014 Customer relationship intangible 8,400 — Less: accumulated amortization (322) — Net customer relationship intangible 8,078 — Total intangibles subject to amortization, net 20,400 14,014 Goodwill 452,007 367,809 Total goodwill and other intangible assets, net $ 472,407 $ 381,823
Schedule of changes in the carrying amounts of goodwill	The following is a summary of changes in the carrying amounts of goodwill for the years indicated (in thousands) : Goodwill (1) December 31, 2019 $ 327,425 Acquisition of Three Shores 40,384 December 31, 2020 367,809 Acquisition of FinTrust 14,163 Acquisition of Aquesta 70,035 December 31, 2021 $ 452,007 (1) Goodwill balances presented are shown net of accumulated impairment losses of $306 million incurred prior to 2019. Gross goodwill for December 31, 2021, 2020, and 2019 totaled $758 million, $673 million and $633 million, respectively.
Schedule of estimated aggregate amortization expense for future periods	The estimated aggregate amortization expense for future periods for finite lived intangibles is as follows (in thousands) : Year 2022 $ 4,081 2023 3,447 2024 2,849 2025 2,169 2026 1,709 Thereafter 6,145 Total $ 20,400

Servicing Assets and Liabilit_2

Servicing Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Transfers and Servicing [Abstract]
Schedule of changes in SBA/USDA servicing rights	The following table summarizes the changes in SBA/USDA servicing rights for the years indicated ( in thousands ). 2021 2020 2019 Beginning of period $ 6,462 $ 6,794 $ 7,510 Acquired servicing rights 581 — — Originated servicing rights capitalized upon sale of loans 2,005 1,114 1,835 Disposals (1,430) (624) (1,258) Changes in fair value due to change in inputs or assumptions used in the valuation (1,105) (822) (1,293) End of period $ 6,513 $ 6,462 $ 6,794
Schedule of key characteristics, inputs, and economic assumptions used to estimate the fair value of SBA/USDA loans servicing asset and sensitivity	A summary of the key characteristics, inputs, and economic assumptions used in the discounted cash flow method utilized to estimate the fair value of the servicing asset for SBA/USDA loans and the sensitivity of the fair values to immediate adverse changes in those assumptions are shown in the table below as of the dates indicated (dollars in thousands) : December 31, 2021 2020 Fair value of retained servicing assets $ 6,513 $ 6,462 Prepayment rate assumption: Weighted average 16.3 % 17.8 % Range 3.2% - 31.3% 2.7% - 33.6% 10% adverse change $ (309) $ (358) 20% adverse change (591) (680) Discount rate: Weighted average 10.3 % 8.9 % Range 0.0% - 45.4% 1.6% - 44.1% 100 bps adverse change $ (166) $ (171) 200 bps adverse change (323) (333)
Schedule of changes in residential mortgage servicing rights	The following table summarizes the changes in residential mortgage servicing rights for the years indicated ( in thousands ). 2021 2020 2019 Beginning of period $ 16,216 $ 13,565 $ 11,877 Originated servicing rights capitalized upon sale of loans 12,510 11,911 5,783 Disposals (4,275) (2,868) (1,098) Changes in fair value due to change in inputs or assumptions used in the valuation 710 (6,392) (2,997) End of period $ 25,161 $ 16,216 $ 13,565
Schedule of key characteristics, inputs, and economic assumptions used to estimate the fair value of residential mortgage loans servicing asset and sensitivity	A summary of the key characteristics, inputs, and economic assumptions used to estimate the fair value of the servicing asset for residential mortgage loans and the sensitivity of the fair values to immediate adverse changes in those assumptions are shown in the table below as of the dates indicated (in thousands) : December 31, 2021 2020 Fair value of retained servicing assets $ 25,161 $ 16,216 Prepayment rate assumption: Weighted average 12.6 % 17.7 % Range 7.0% - 77.6% 8.7% - 19.5% 10% adverse change $ (1,229) $ (999) 20% adverse change (2,367) (1,912) Discount rate: Weighted average 9.5 % 10.0 % Range 9.5% - 10.5% 10.0% - 11.0% 100 bps adverse change $ (877) $ (518) 200 bps adverse change (1,693) (1,001)

Time Deposits (Tables)

Time Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Schedule of contractual maturities of time deposits, including brokered time deposits	At December 31, 2021, the contractual maturities of time deposits, including brokered time deposits, are summarized as follows (in thousands) : 2022 $ 1,237,100 2023 142,305 2024 35,497 2025 21,479 2026 19,810 Thereafter 50,260 Total time deposits $ 1,506,451

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of long-term debt	Long-term debt consisted of the following (in thousands) : December 31, Issue Date Stated Maturity Date Earliest Call Date 2021 2020 Interest Rate Obligations of the Bank: 2026 subordinated debentures $ — $ 15,000 2016 2026 2021 5.875% through August 2021, 3-month LIBOR plus 4.70% thereafter — 15,000 Obligations of the Holding Company: 2022 senior debentures — 50,000 2015 2022 2020 5.000% through August 2020, 3-month LIBOR plus 3.814% thereafter 2027 senior debentures 35,000 35,000 2015 2027 2025 5.500% through August 2025, 3-month LIBOR plus 3.71% thereafter 2030 senior debentures 100,000 100,000 2020 2030 2025 5.00% through June 2025, 3-month SOFR plus 4.87% thereafter Total senior debentures 135,000 185,000 2028 subordinated debentures 100,000 100,000 2018 2028 2023 4.500% through January 2023, 3-month LIBOR plus 2.12% thereafter 2025 subordinated debentures — 11,250 2015 2025 2020 6.250% Total subordinated debentures 100,000 111,250 Southern Bancorp Capital Trust I — 4,382 2004 2034 2009 Prime + 1.00% Tidelands Statutory Trust I 8,248 8,248 2006 2036 2011 3-month LIBOR plus 1.38% Four Oaks Statutory Trust I 12,372 12,372 2006 2036 2011 3-month LIBOR plus 1.35% Total trust preferred securities 20,620 25,002 Less net discount (8,260) (9,296) Total long-term debt $ 247,360 $ 326,956

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Schedule of ROU asset and operating lease liability	The following table presents the balances of the ROU asset and corresponding operating lease liability as of the dates indicated (in thousands). December 31, Balance Sheet Location 2021 2020 ROU asset Other assets $ 29,421 $ 31,398 Operating lease liability Other liabilities 31,072 33,095
Schedule of operating lease income and expense and other supplemental information	The table below presents the operating lease income and expense recognized for the periods indicated (in thousands). Income Statement Location 2021 2020 2019 Operating lease cost Occupancy expense $ 8,186 $ 6,449 $ 5,067 Variable lease cost Occupancy expense 1,066 757 449 Short-term lease cost Occupancy expense 85 100 136 Total lease cost $ 9,337 $ 7,306 $ 5,652 Sublease income and rental income from owned properties under operating leases Other noninterest income $ 976 $ 1,022 $ 1,160 Weighted average remaining lease term 5.40 years 5.74 years 5.33 years Weighted average discount rate 1.58 % 1.79 % 2.79 %
Schedule of future minimum lease payments under operating leases	As of December 31, 2021, future minimum lease payments under operating leases were as follows (in thousands) : Year 2022 $ 8,197 2023 8,080 2024 4,222 2025 2,933 2026 2,756 Thereafter 6,242 Total 32,430 Less discount (1,358) Present value of lease liability $ 31,072

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured at fair value on a recurring basis	The table below presents United’s assets and liabilities measured at fair value on a recurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall (in thousands) : December 31, 2021 Level 1 Level 2 Level 3 Total Assets: AFS debt securities: U.S. Treasuries $ 217,520 $ — $ — $ 217,520 U.S. Government agencies & GSEs — 187,032 — 187,032 State and political subdivisions — 275,844 — 275,844 Residential MBS — 2,145,134 — 2,145,134 Commercial MBS — 873,851 — 873,851 Corporate bonds — 190,771 2,395 193,166 Asset-backed securities — 604,277 — 604,277 Equity securities with readily determinable fair values — 1,302 — 1,302 Mortgage loans held for sale — 44,109 — 44,109 Deferred compensation plan assets 11,769 — — 11,769 Servicing rights for SBA/USDA loans — — 6,513 6,513 Residential mortgage servicing rights — — 25,161 25,161 Derivative financial instruments — 35,722 6,758 42,480 Total assets $ 229,289 $ 4,358,042 $ 40,827 $ 4,628,158 Liabilities: Deferred compensation plan liability $ 11,795 $ — $ — $ 11,795 Derivative financial instruments — 20,097 5,048 25,145 Total liabilities $ 11,795 $ 20,097 $ 5,048 $ 36,940 December 31, 2020 Level 1 Level 2 Level 3 Total Assets: AFS debt securities: U.S. Treasuries $ 128,072 $ — $ — $ 128,072 U.S. Government agencies & GSEs — 152,972 — 152,972 State and political subdivisions — 274,472 — 274,472 Residential MBS — 1,485,585 — 1,485,585 Commercial MBS — 549,131 — 549,131 Corporate bonds — 70,017 1,750 71,767 Asset-backed securities — 562,722 — 562,722 Equity securities with readily determinable fair values 774 913 — 1,687 Mortgage loans held for sale — 105,433 — 105,433 Deferred compensation plan assets 9,584 — — 9,584 Servicing rights for SBA/USDA loans — — 6,462 6,462 Residential mortgage servicing rights — — 16,216 16,216 Derivative financial instruments — 75,887 10,779 86,666 Total assets $ 138,430 $ 3,277,132 $ 35,207 $ 3,450,769 Liabilities: Deferred compensation plan liability $ 9,590 $ — $ — $ 9,590 Derivative financial instruments — 26,595 2,408 29,003 Total liabilities $ 9,590 $ 26,595 $ 2,408 $ 38,593
Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs	The following table shows a reconciliation of the beginning and ending balances for all other assets measured at fair value on a recurring basis using significant unobservable inputs that are classified as Level 3 values (in thousands) : Derivative Derivative Corporate Bonds December 31, 2018 $ 11,841 $ 15,732 $ 995 Sales and settlements (1,135) (2,330) — Fair value adjustments included in OCI — — 3 Fair value adjustments included in earnings (3,468) (4,843) — December 31, 2019 7,238 8,559 998 Transfers into Level 3 (1) 583 — — Additions 368 — 1,750 Sales and settlements — — (1,000) Fair value adjustments included in OCI — — 2 Fair value adjustments included in earnings 2,590 (6,151) — December 31, 2020 10,779 2,408 1,750 Transfers into Level 3 (1) 74 — — Additions 261 170 500 Fair value adjustments included in OCI — — 145 Fair value adjustments included in earnings (4,356) 2,470 — December 31, 2021 $ 6,758 $ 5,048 $ 2,395
Schedule of liabilities measured at fair value on a recurring basis using significant unobservable inputs	The following table shows a reconciliation of the beginning and ending balances for all other assets measured at fair value on a recurring basis using significant unobservable inputs that are classified as Level 3 values (in thousands) : Derivative Derivative Corporate Bonds December 31, 2018 $ 11,841 $ 15,732 $ 995 Sales and settlements (1,135) (2,330) — Fair value adjustments included in OCI — — 3 Fair value adjustments included in earnings (3,468) (4,843) — December 31, 2019 7,238 8,559 998 Transfers into Level 3 (1) 583 — — Additions 368 — 1,750 Sales and settlements — — (1,000) Fair value adjustments included in OCI — — 2 Fair value adjustments included in earnings 2,590 (6,151) — December 31, 2020 10,779 2,408 1,750 Transfers into Level 3 (1) 74 — — Additions 261 170 500 Fair value adjustments included in OCI — — 145 Fair value adjustments included in earnings (4,356) 2,470 — December 31, 2021 $ 6,758 $ 5,048 $ 2,395
Schedule of quantitative information about Level 3 fair value measurements for fair value on a recurring basis	The following table presents quantitative information about recurring Level 3 fair value measurements, excluding servicing rights which are detailed in Note 10 (in thousands) : Level 3 Assets and Liabilities Valuation Technique December 31, Significant Unobservable Inputs 2021 2020 Range Weighted Average Range Weighted Average Derivative assets - mortgage Internal model Pull through rate 45.9% - 100% 87.2% 65.6% - 100% 83.9% Derivative assets - customer derivative positions Internal model Estimated loss rate 33.4 - 44.0 36.0 100 - 100 100 Derivative assets & liabilities - other Dealer priced Dealer priced N/A N/A N/A N/A Corporate bonds Indicative bid provided by a broker Multiple factors, including but not limited to, current operations, financial condition, cash flows, and similar financing transactions executed in the market N/A N/A Discounted cash flow Discount rate 3.6 - 3.8 3.6
Schedule of loans held for sale at fair value under the fair value option	The following tables present the fair value and outstanding principal balance of these loans, as well as the gain or loss recognized resulting from the change in fair value for the periods indicated (in thousands) . Mortgage Loans Held for Sale December 31, 2021 2020 Outstanding principal balance $ 42,581 $ 99,746 Fair value 44,109 105,433 Amount of Gain (Loss) Recognized on Location 2021 2020 2019 Mortgage loan gains and other related fees $ (4,159) $ 3,815 $ 1,177
Schedule of presentation of assets measured at fair value on nonrecurring basis	The following table presents the fair value hierarchy and carrying value of all assets that were still held as of December 31, 2021 and 2020, for which a nonrecurring fair value adjustment was recorded during the periods presented (in thousands) . December 31, 2021 Level 1 Level 2 Level 3 Total Loans $ — $ — $ 2,536 $ 2,536 December 31, 2020 Loans $ — $ — $ 29,404 $ 29,404
Schedule of carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis	The carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis in United’s consolidated balance sheets are as follows (in thousands) : Carrying Amount Fair Value Level December 31, 2021 Level 1 Level 2 Level 3 Total Assets: HTM debt securities $ 1,156,098 $ — $ 1,148,804 $ — $ 1,148,804 Loans, net 11,657,814 — — 11,607,821 11,607,821 Liabilities: Deposits 18,241,179 — 18,239,934 — 18,239,934 Long-term debt 247,360 — — 267,064 267,064 December 31, 2020 Assets: HTM debt securities $ 420,361 $ — $ 437,193 $ — $ 437,193 Loans, net 11,233,805 — — 11,209,717 11,209,717 Liabilities: Deposits 15,232,358 — 15,232,274 — 15,232,274 Long-term debt 326,956 — — 336,763 336,763

Equity Compensation Plans (Tabl

Equity Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of restricted stock units and options outstanding and activity	Restricted stock units and options outstanding and activity for the years ended December 31 consisted of the following: Restricted Stock Units Options Shares Weighted Average Grant Date Fair Value Aggregate Shares Weighted Average Exercise Price Weighted Average Remaining Term (Yrs.) Aggregate Intrinsic Value (000’s) December 31, 2018 759,746 $ 27.66 47,139 $ 27.07 Granted 315,827 26.74 — — Vested / Exercised (216,138) 25.38 (13,000) 16.34 Expired — (30,243) 31.43 Cancelled (51,011) 27.18 (2,396) 29.68 December 31, 2019 808,424 27.94 1,500 27.95 Granted 446,512 19.15 — — Vested / Exercised (324,697) 26.42 — — Expired — (1,500) 27.95 Cancelled (36,808) 25.73 — — December 31, 2020 893,431 23.75 — — Granted 302,701 30.34 62,743 8.30 Vested / Exercised (330,598) 26.13 $ 10,855 (27,283) 8.20 $ 765 Cancelled (57,060) 25.15 — — December 31, 2021 808,474 25.15 29,057 35,460 8.38 2.01 977 Vested / Exercisable at December 31, 2021 — — 35,460 8.38 2.01 977

Reclassifications Out of AOCI (

Reclassifications Out of AOCI (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of details regarding amounts reclassified out of AOCI	The following presents the details regarding amounts reclassified out of AOCI (in thousands). Amounts Reclassified from AOCI For the Years Ended December 31, Details about AOCI Components Affected Line Item in the Statement Where Net Income is Presented 2021 2020 2019 Realized gains (losses) on AFS securities: $ 83 $ 748 $ (1,021) Securities gains (losses), net 46 (191) 247 Income tax (expense) benefit $ 129 $ 557 $ (774) Net of tax Amortization of losses included in net income on AFS securities transferred to HTM: $ — $ (723) $ (383) Investment securities interest revenue — 173 92 Income tax benefit $ — $ (550) $ (291) Net of tax Reclassifications related to derivative financial instruments accounted for as cash flow hedges: Amortization of losses on de-designated positions $ — $ — $ (235) Other expense Amortization of losses on de-designated positions — — (102) Deposit interest expense Interest rate contracts (608) (359) — Long-term debt interest expense (608) (359) (337) Total before tax 156 91 86 Income tax benefit $ (452) $ (268) $ (251) Net of tax Reclassifications related to defined benefit pension plan activity: Prior service cost $ (469) $ (531) $ (640) Salaries and employee benefits expense Actuarial losses (575) (326) (59) Other expense Termination of Funded Plan — — (1,558) Merger-related and other (1,044) (857) (2,257) Total before tax 267 219 576 Income tax benefit $ (777) $ (638) $ (1,681) Net of tax Total reclassifications for the period $ (1,100) $ (899) $ (2,997) Net of tax Amounts shown above in parentheses reduce earnings

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted net income per common share	The following table sets forth the computation of basic and diluted net income per common share for the years indicated (in thousands, except per share data) : Year Ended December 31, 2021 2020 2019 Net income $ 269,801 $ 164,089 $ 185,721 Earnings allocated to participating securities (1,657) (1,287) (1,375) Dividends on preferred stock (6,875) (3,533) — Net income available to common stockholders $ 261,269 $ 159,269 $ 184,346 Net income per common share: Basic $ 2.97 $ 1.91 $ 2.31 Diluted 2.97 1.91 2.31 Weighted average common shares: Basic 87,940 83,184 79,700 Effect of dilutive securities: Stock options 9 — 1 Restricted stock units 148 64 7 Diluted 88,097 83,248 79,708

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of income tax expense	Income tax expense is as follows for the years indicated (in thousands) : Year Ended December 31, 2021 2020 2019 Current $ 57,175 $ 42,688 $ 38,082 Deferred 20,787 2,668 14,909 Total income tax expense $ 77,962 $ 45,356 $ 52,991
Schedule of differences between the provision for income taxes and statutory federal income tax rate	The differences between the provision for income taxes and the amount computed by applying the statutory federal income tax rate of 21% in 2021, 2020 and 2019 to income before income taxes are as follows for the years indicated (in thousands) : Year Ended December 31, 2021 2020 2019 Income tax expense on pretax income at statutory rates $ 73,030 $ 43,983 $ 50,130 Add (deduct): State taxes, net of federal benefit 9,188 5,928 7,168 BOLI earnings (745) (1,052) (1,127) Adjustment to reserve for uncertain tax positions 153 (1,212) 84 Tax-exempt interest revenue (2,520) (2,169) (1,827) Equity compensation (891) (174) (375) Transaction costs 117 217 16 Tax credit investments (598) (930) (464) Other 228 765 (614) Total income tax expense $ 77,962 $ 45,356 $ 52,991
Schedule of summarizes the sources and expected tax consequences of future taxable deductions (revenue)	The following summarizes the sources and expected tax consequences of future taxable deductions (revenue) which comprise the net DTA as of the dates indicated (in thousands) : December 31, 2021 2020 DTAs: ACL $ 24,349 $ 33,213 Net operating loss carryforwards 16,656 22,277 Deferred compensation 11,011 10,012 Loan purchase accounting adjustments 4,227 8,567 Nonqualified share based compensation 1,374 1,833 Accrued expenses 7,936 6,865 Unamortized pension actuarial losses and prior service cost 1,442 1,981 Unrealized losses on AFS securities 5,808 — Deferred gains on SBA/USDA loan sales 2,217 2,060 Lease liability 7,501 8,055 Other 1,107 2,062 Total DTAs 83,628 96,925 DTLs: Unrealized gains on AFS securities — 17,439 Unrealized gains on cash flow hedges 1,189 54 Acquired intangible assets 2,412 2,576 Premises and equipment 5,179 4,241 Loan origination costs 6,466 4,857 True tax leases 5,984 7,846 Servicing assets 6,779 4,816 Derivatives 1,309 2,250 ROU asset 7,102 7,642 Securities purchase accounting adjustments 2,644 3,146 Uncertain tax positions 1,945 1,813 Other 386 230 Total DTLs 41,395 56,910 Less valuation allowance 911 1,604 Net DTA $ 41,322 $ 38,411
Schedule of reconciliation of the beginning and ending unrecognized tax benefit related to uncertain tax positions	A reconciliation of the beginning and ending unrecognized tax benefit related to uncertain tax positions is as follows for the years indicated (in thousands) : 2021 2020 2019 Balance at beginning of year $ 2,163 $ 3,370 $ 3,264 Additions based on tax positions related to the current year 634 421 481 Decreases resulting from a lapse in the applicable statute of limitations (441) (1,628) (375) Balance at end of year $ 2,356 $ 2,163 $ 3,370

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Schedule of weighted-average assumptions used to determine pension benefit obligations	Weighted-average assumptions used to determine the pension benefit obligation of the Modified Retirement Plan at year end and net periodic pension cost are shown in the table below: 2021 2020 Discount rate for disclosures 2.90 % 2.55 % Discount rate for net periodic benefit cost 2.55 % 3.25 % Measurement date 12/31/2021 12/31/2020
Schedule of changes in obligations and plan assets	United recognizes the unfunded status of the Modified Retirement Plan as a liability in the consolidated balance sheets. Information about changes in obligations and plan assets follows (in thousands) : Modified Retirement Plan 2021 2020 Accumulated benefit obligation: Accumulated benefit obligation - beginning of year $ 27,099 $ 25,105 Service cost 659 588 Interest cost 676 795 Actuarial (gains) losses (1,066) 1,804 Benefits paid (1,107) (1,193) Accumulated benefit obligation - end of year 26,261 27,099 Change in plan assets, at fair value: Beginning plan assets — — Employer contribution 1,107 1,193 Benefits paid (1,107) (1,193) Plan assets - end of year — — Funded status - end of year (plan assets less benefit obligations) $ (26,261) $ (27,099)
Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income	Components of net periodic benefit cost and other amounts recognized in other comprehensive income are as follows (in thousands): 2021 2020 2019 Modified Modified Modified Funded Service cost $ 659 $ 588 $ 392 $ — Interest cost 676 795 931 166 Expected return on plan assets — — — (106) Amortization of prior service cost 469 531 635 — Amortization of net actuarial losses 576 326 59 — Net periodic benefit cost $ 2,380 $ 2,240 $ 2,017 $ 60
Schedule of estimated future benefit payments expected to be paid	The following table summarizes the estimated future benefit payments expected to be paid from the Modified Retirement Plan for the periods indicated (in thousands) . 2022 $ 1,191 2023 1,185 2024 1,179 2025 1,192 2026 1,213 2027-2031 8,276

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2021
Regulatory Capital Requirements Under Banking Regulations [Abstract]
Schedule of minimum amounts required for capital adequacy purposes	Regulatory capital ratios at December 31, 2021 and 2020, along with the minimum amounts required for capital adequacy purposes and to be well-capitalized under prompt corrective action provisions in effect at such times are presented below for United and the Bank (dollars in thousands) : Basel III Guidelines United Community Banks, Inc. United Community Bank Minimum (1) Well 2021 2020 2021 2020 Risk-based ratios: CET1 capital 4.5 % 6.5 % 12.46 % 12.31 % 12.87 % 13.31 % Tier 1 capital 6.0 8.0 13.17 13.10 12.87 13.31 Total capital 8.0 10.0 14.65 15.15 13.46 14.28 Tier 1 leverage ratio 4.0 5.0 8.75 9.28 8.53 9.42 CET1 capital $ 1,688,176 $ 1,506,750 $ 1,738,557 $ 1,625,292 Tier 1 capital 1,784,598 1,603,172 1,738,557 1,625,292 Total capital 1,984,376 1,854,368 1,818,335 1,743,045 RWAs 13,548,534 12,240,440 13,512,405 12,207,940 Average total assets 20,402,842 17,276,853 20,377,319 17,246,878 (1) As of December 31, 2021 and 2020, the additional capital conservation buffer in effect was 2.50%.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of the contract amount of off-balance sheet instruments	The following table summarizes, as of the dates indicated, the contract amount of off-balance sheet instruments (in thousands) : December 31, 2021 2020 Financial instruments whose contract amounts represent credit risk: Commitments to extend credit $ 3,591,975 $ 3,052,657 Letters of credit 29,312 31,748

Condensed Financial Statement_2

Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Schedule of condensed balance sheets	Balance Sheets As of December 31, 2021 and 2020 (in thousands) 2021 2020 Assets Cash and cash equivalents $ 298,316 $ 289,243 Investment in Bank 2,150,683 2,028,965 Investment in other subsidiaries 23,194 752 Other assets 46,432 34,661 Total assets $ 2,518,625 $ 2,353,621 Liabilities and Shareholders’ Equity Long-term debt $ 247,360 $ 311,956 Other liabilities 49,020 34,135 Total liabilities 296,380 346,091 Shareholders’ equity 2,222,245 2,007,530 Total liabilities and shareholders’ equity $ 2,518,625 $ 2,353,621
Schedule of condensed statements of income	Statements of Income For the Years Ended December 31, 2021, 2020 and 2019 (in thousands) 2021 2020 2019 Dividends from Bank $ 217,000 $ 150,000 $ — Dividends from other subsidiaries — — 4,651 Shared service fees from subsidiaries 12,402 13,020 14,721 Other 3,167 1,436 1,468 Total income 232,569 164,456 20,840 Interest expense 14,324 13,994 11,573 Other expense 16,417 16,473 18,965 Total expenses 30,741 30,467 30,538 Income tax benefit 6,908 2,681 8,711 Income (loss) before equity in undistributed earnings of subsidiaries 208,736 136,670 (987) Equity in undistributed earnings of subsidiaries 61,065 27,419 186,708 Net income $ 269,801 $ 164,089 $ 185,721
Schedule of condensed statements of cash flows	Statements of Cash Flows For the Years Ended December 31, 2021, 2020 and 2019 (in thousands) 2021 2020 2019 Operating activities: Net income $ 269,801 $ 164,089 $ 185,721 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of the subsidiaries (61,065) (27,419) (186,708) Stock-based compensation 6,554 7,887 9,360 Change in assets and liabilities: Other assets (7,800) (3,662) (3,022) Other liabilities 6,353 5,261 2,080 Net cash provided by operating activities 213,843 146,156 7,431 Investing activities: Net cash (paid) received for acquisition (47,785) 3,397 (52,093) Purchases of premises and equipment (30) — — Purchases of debt securities available-for-sale and equity securities (1,500) (2,750) (3,000) Proceeds from sales and maturities of debt securities available-for-sale and equity securities 1,253 — 83 Proceeds from sale of premises and equipment 728 — — Other investing inflows 132 — — Other investing outflows (600) — — Net cash (used in) provided by investing activities (47,802) 647 (55,010) Financing activities: Repayment of long-term debt (65,632) — (250) Proceeds from issuance of long-term debt, net of issuance costs — 98,552 — Proceeds from issuance of preferred stock, net of issuance costs — 96,422 — Cash paid for shares withheld to cover payroll taxes related to equity instruments (3,182) (3,119) (1,686) Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans 506 1,317 2,193 Proceeds from exercise of stock options and warrants 231 — 212 Repurchase of common stock (15,101) (20,782) (13,020) Cash dividends on preferred stock (6,876) (3,533) — Cash dividends on common stock (66,914) (58,912) (53,044) Net cash (used in) provided by financing activities (156,968) 109,945 (65,595) Net change in cash 9,073 256,748 (113,174) Cash at beginning of year 289,243 32,495 145,669 Cash at end of year $ 298,316 $ 289,243 $ 32,495

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)segment
Accounting Policies [Line Items]
Number of operating segments	1
Number of reportable segments	1
Investment in FHLB stock | $	$ 9,230
Buildings and improvements | Minimum
Accounting Policies [Line Items]
Estimated useful life (in years)	10 years
Buildings and improvements | Maximum
Accounting Policies [Line Items]
Estimated useful life (in years)	40 years
Land improvements
Accounting Policies [Line Items]
Estimated useful life (in years)	10 years
Furniture and equipment | Minimum
Accounting Policies [Line Items]
Estimated useful life (in years)	3 years
Furniture and equipment | Maximum
Accounting Policies [Line Items]
Estimated useful life (in years)	10 years
Loan portfolio | Credit concentration risk | Real estate valuation changes
Accounting Policies [Line Items]
Concentration risk, percentage	73.00%

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details)	Oct. 01, 2021USD ($)shares	Jul. 06, 2021USD ($)shares	Jul. 01, 2020USD ($)bank_branchshares	Dec. 31, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Business Acquisition [Line Items]
Goodwill				$ 367,809,000	$ 452,007,000	$ 367,809,000	$ 327,425,000
Merger-related and other charges					13,970,000	7,018,000	6,907,000
FinTrust
Business Acquisition [Line Items]
Total consideration		$ 21,700,000
Common stock issued in acquisition		$ 4,400,000
Shares issued in acquisition (in shares) | shares		132,299
Cash consideration		$ 9,620,000
Payable due		4,400,000
Contingent consideration		3,300,000
Assets acquired		22,800,000
Liabilities assumed		1,100,000
Goodwill		14,200,000
Right-of-use assets recognized		822,000
Operating lease liabilities recognized		822,000
FinTrust | Merger-related costs
Business Acquisition [Line Items]
Merger-related and other charges					518,000
FinTrust | Customer relationship intangible
Business Acquisition [Line Items]
Intangible assets acquired		$ 7,530,000
Expected useful life of acquired intangible (in years)		15 years
Aquesta
Business Acquisition [Line Items]
Total consideration	$ 131,666,000
Common stock issued in acquisition	$ 89,646,000
Shares issued in acquisition (in shares) | shares	2,731,435
Cash consideration	$ 40,542,000
Assets acquired	755,948,000
Liabilities assumed	694,317,000
Goodwill	70,035,000
Intangible assets acquired	2,030,000
Goodwill expected to be tax deductible	$ 0
Aquesta | Merger-related costs
Business Acquisition [Line Items]
Merger-related and other charges					$ 9,000,000
Aquesta | Core deposit intangible
Business Acquisition [Line Items]
Expected useful life of acquired intangible (in years)	10 years
Three Shores
Business Acquisition [Line Items]
Total consideration			$ 187,697,000
Common stock issued in acquisition			$ 163,589,000
Shares issued in acquisition (in shares) | shares			8,130,633
Cash consideration			$ 24,108,000
Assets acquired			2,134,339,000
Liabilities assumed			1,987,026,000
Goodwill			40,384,000
Intangible assets acquired			3,360,000
Goodwill expected to be tax deductible			$ 0
Number of banking offices | bank_branch			14
Measurement period adjustment increase to cash and cash equivalents				1,090,000
Measurement period adjustment increase to accrued interest receivable				116,000
Goodwill adjustment increase (decrease)				$ (1,210,000)
Three Shores | Merger-related costs
Business Acquisition [Line Items]
Merger-related and other charges						$ 5,040,000
Three Shores | Core deposit intangible
Business Acquisition [Line Items]
Expected useful life of acquired intangible (in years)			10 years
FMBT | Merger-related costs
Business Acquisition [Line Items]
Merger-related and other charges							$ 2,020,000

Acquisitions - Acquisition date

Acquisitions - Acquisition date fair value of purchased assets and assumed liabilities and supplementary information (Details) - USD ($) $ in Thousands	Oct. 01, 2021	Jul. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consideration transferred
Goodwill			$ 452,007	$ 367,809	$ 327,425
Aquesta
Assets
Cash and cash equivalents	$ 153,091
Debt securities	60,762
Loans	498,312
Premises and equipment	18,112
BOLI	12,540
Accrued interest receivable	1,419
Net deferred tax asset	2,129
Core deposit intangible	2,030
Other assets	7,553
Total assets acquired	755,948
Liabilities
Deposits	657,724
FHLB advances and long-term debt	24,509
Other liabilities	12,084
Total liabilities assumed	694,317
Total identifiable net assets	61,631
Consideration transferred
Cash	40,542
Common stock issued	$ 89,646
Common stock issued (in shares)	2,731,435
Option and warrant equity instruments converted	$ 1,478
Total fair value of consideration transferred	131,666
Goodwill	70,035
PCD loans:
Purchase price	71,343
Non-PCD loans:
Fair value	426,969
Gross contractual amounts receivable	482,737
Estimate of contractual cash flows not expected to be collected	3,399
Aquesta | Purchase loans
PCD loans:
Par Value	75,579
ACL at acquisition	(3,544)
Non-credit discount	$ (692)
Three Shores
Assets
Cash and cash equivalents		$ 219,807
Debt securities		381,740
Loans		1,427,966
Premises and equipment		1,584
Accrued interest receivable		7,681
Derivative assets		11,800
Net deferred tax asset		15,061
Core deposit intangible		3,360
Other assets		65,340
Total assets acquired		2,134,339
Liabilities
Deposits		1,802,694
FHLB advances and long-term debt		144,121
Derivative liabilities		12,165
Other liabilities		28,046
Total liabilities assumed		1,987,026
Total identifiable net assets		147,313
Consideration transferred
Cash		24,108
Common stock issued		$ 163,589
Common stock issued (in shares)		8,130,633
Total fair value of consideration transferred		$ 187,697
Goodwill		40,384
Non-PCD loans:
Fair value		1,164,675
Gross contractual amounts receivable		1,358,793
Estimate of contractual cash flows not expected to be collected		76,503
Three Shores | Purchase loans
PCD loans:
Par Value		283,137
ACL at acquisition		(11,152)
Non-credit discount		(8,694)
Purchase price		$ 263,291

Acquisitions - Pro forma inform

Acquisitions - Pro forma information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Supplemental consolidated pro forma revenue	$ 771,289	$ 622,848	$ 636,079
Supplemental consolidated pro forma net income	279,568	164,284	210,232
Aquesta
Business Acquisition [Line Items]
Actual revenue included since acquisition date	2,122
Actual net income included since acquisition date	(282)
FinTrust
Business Acquisition [Line Items]
Actual revenue included since acquisition date	4,326
Actual net income included since acquisition date	$ (26)
Three Shores
Business Acquisition [Line Items]
Actual revenue included since acquisition date		24,541
Actual net income included since acquisition date		$ 6,800
FMBT
Business Acquisition [Line Items]
Actual revenue included since acquisition date			7,525
Actual net income included since acquisition date			$ 4,053

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid during the period for:
Interest	$ 32,000	$ 59,967	$ 85,973
Income taxes paid	55,754	36,536	33,776
Transferred to foreclosed property	1,849	822	1,173
Unsettled sales of government guaranteed loans	0	0	8,194
Assets acquired, fair value	848,806	2,174,723	264,937
Liabilities assumed, fair value	695,420	1,987,026	212,844
Net assets acquired	153,386	187,697	52,093
Common stock issued for acquisitions	95,525	163,589
Other non-cash consideration	9,178	0	0
Common Stock
Cash paid during the period for:
Common stock issued for acquisitions	$ 94,046	$ 163,589	$ 0

Investment Securities - Narrati

Investment Securities - Narrative (Details)	Dec. 31, 2021USD ($)security	Dec. 31, 2020USD ($)
Investments, Debt and Equity Securities [Abstract]
Carrying value of securities pledged to secure public deposits, derivatives and other secured borrowings	$ 1,460,000,000	$ 1,110,000,000
Number of AFS debt securities in unrealized loss position | security	408
Number of HTM debt securities in unrealized loss position | security	94
Allowance for credit losses, HTM portfolio	$ 0	0
Allowance for credit losses, AFS portfolio	$ 0	$ 0

Investment Securities - Cost ba

Investment Securities - Cost basis, unrealized gains and losses, and fair value of debt securities HTM (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
HTM debt securities:
Amortized Cost	$ 1,156,098	$ 420,361
Gross Unrealized Gains	10,509	17,332
Gross Unrealized Losses	17,803	500
Fair Value	1,148,804	437,193
U.S. Treasuries
HTM debt securities:
Amortized Cost	19,803
Gross Unrealized Gains	20
Gross Unrealized Losses	0
Fair Value	19,823
U.S. Government agencies & GSEs
HTM debt securities:
Amortized Cost	70,180	10,575
Gross Unrealized Gains	0	26
Gross Unrealized Losses	1,121	11
Fair Value	69,059	10,590
State and political subdivisions
HTM debt securities:
Amortized Cost	257,688	197,723
Gross Unrealized Gains	4,341	7,658
Gross Unrealized Losses	4,080	242
Fair Value	257,949	205,139
Residential MBS, Agency & GSE
HTM debt securities:
Amortized Cost	381,641	113,400
Gross Unrealized Gains	2,021	4,774
Gross Unrealized Losses	3,687	1
Fair Value	379,975	118,173
Commercial MBS, Agency & GSE
HTM debt securities:
Amortized Cost	411,786	98,663
Gross Unrealized Gains	4,106	4,874
Gross Unrealized Losses	8,915	246
Fair Value	406,977	$ 103,291
Supranational entities
HTM debt securities:
Amortized Cost	15,000
Gross Unrealized Gains	21
Gross Unrealized Losses	0
Fair Value	$ 15,021

Investment Securities - Cost _2

Investment Securities - Cost basis, unrealized gains and losses, and fair value of AFS debt securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
AFS debt securities:
Amortized Cost	$ 4,516,529	$ 3,152,111
Gross Unrealized Gains	36,593	75,108
Gross Unrealized Losses	56,298	2,498
Fair Value	4,496,824	3,224,721
U.S. Treasuries
AFS debt securities:
Amortized Cost	218,027	123,677
Gross Unrealized Gains	1,661	4,395
Gross Unrealized Losses	2,168	0
Fair Value	217,520	128,072
U.S. Government agencies & GSEs
AFS debt securities:
Amortized Cost	189,855	152,596
Gross Unrealized Gains	605	701
Gross Unrealized Losses	3,428	325
Fair Value	187,032	152,972
State and political subdivisions
AFS debt securities:
Amortized Cost	263,269	253,630
Gross Unrealized Gains	15,237	20,891
Gross Unrealized Losses	2,662	49
Fair Value	275,844	274,472
Residential MBS, Agency & GSE
AFS debt securities:
Amortized Cost	2,079,700	1,275,551
Gross Unrealized Gains	9,785	29,107
Gross Unrealized Losses	28,521	766
Fair Value	2,060,964	1,303,892
Residential MBS, Non-agency
AFS debt securities:
Amortized Cost	81,925	174,322
Gross Unrealized Gains	2,249	7,499
Gross Unrealized Losses	4	128
Fair Value	84,170	181,693
Commercial MBS, Agency & GSE
AFS debt securities:
Amortized Cost	870,563	524,852
Gross Unrealized Gains	2,974	8,013
Gross Unrealized Losses	16,156	597
Fair Value	857,381	532,268
Commercial MBS, Non-agency
AFS debt securities:
Amortized Cost	15,202	15,350
Gross Unrealized Gains	1,268	1,513
Gross Unrealized Losses	0	0
Fair Value	16,470	16,863
Corporate bonds
AFS debt securities:
Amortized Cost	194,164	70,057
Gross Unrealized Gains	814	1,711
Gross Unrealized Losses	1,812	1
Fair Value	193,166	71,767
Asset-backed securities
AFS debt securities:
Amortized Cost	603,824	562,076
Gross Unrealized Gains	2,000	1,278
Gross Unrealized Losses	1,547	632
Fair Value	$ 604,277	$ 562,722

Investment Securities - HTM deb

Investment Securities - HTM debt securities in unrealized loss position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Summary of HTM debt securities in an unrealized loss position
Fair Value, Less than 12 Months	$ 798,967	$ 45,502
Unrealized Loss, Less than 12 Months	16,705	490
Fair Value, 12 Months or More	23,791	1,352
Unrealized Loss, 12 Months or More	1,098	10
Fair Value, Total	822,758	46,854
Unrealized Loss, Total	17,803	500
U.S. Government agencies & GSEs
Summary of HTM debt securities in an unrealized loss position
Fair Value, Less than 12 Months	64,658	4,677
Unrealized Loss, Less than 12 Months	888	11
Fair Value, 12 Months or More	4,401	0
Unrealized Loss, 12 Months or More	233	0
Fair Value, Total	69,059	4,677
Unrealized Loss, Total	1,121	11
State and political subdivisions
Summary of HTM debt securities in an unrealized loss position
Fair Value, Less than 12 Months	131,128	14,870
Unrealized Loss, Less than 12 Months	3,590	242
Fair Value, 12 Months or More	9,006	0
Unrealized Loss, 12 Months or More	490	0
Fair Value, Total	140,134	14,870
Unrealized Loss, Total	4,080	242
Residential MBS, Agency & GSE
Summary of HTM debt securities in an unrealized loss position
Fair Value, Less than 12 Months	289,132	999
Unrealized Loss, Less than 12 Months	3,687	1
Fair Value, 12 Months or More	0	0
Unrealized Loss, 12 Months or More	0	0
Fair Value, Total	289,132	999
Unrealized Loss, Total	3,687	1
Commercial MBS, Agency & GSE
Summary of HTM debt securities in an unrealized loss position
Fair Value, Less than 12 Months	314,049	24,956
Unrealized Loss, Less than 12 Months	8,540	236
Fair Value, 12 Months or More	10,384	1,352
Unrealized Loss, 12 Months or More	375	10
Fair Value, Total	324,433	26,308
Unrealized Loss, Total	$ 8,915	$ 246

Investment Securities - AFS deb

Investment Securities - AFS debt securities in unrealized loss position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	$ 2,787,798	$ 450,517
Unrealized Loss, Less than 12 Months	49,598	1,893
Fair Value, 12 Months or More	164,323	54,194
Unrealized Loss, 12 Months or More	6,700	605
Fair Value, Total	2,952,121	504,711
Unrealized Loss, Total	56,298	2,498
U.S. Treasuries
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	111,606
Unrealized Loss, Less than 12 Months	2,168
Fair Value, 12 Months or More	0
Unrealized Loss, 12 Months or More	0
Fair Value, Total	111,606
Unrealized Loss, Total	2,168
U.S. Government agencies & GSEs
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	132,893	27,952
Unrealized Loss, Less than 12 Months	2,591	324
Fair Value, 12 Months or More	20,093	607
Unrealized Loss, 12 Months or More	837	1
Fair Value, Total	152,986	28,559
Unrealized Loss, Total	3,428	325
State and political subdivisions
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	69,302	9,402
Unrealized Loss, Less than 12 Months	2,581	49
Fair Value, 12 Months or More	3,148	0
Unrealized Loss, 12 Months or More	81	0
Fair Value, Total	72,450	9,402
Unrealized Loss, Total	2,662	49
Residential MBS, Agency & GSE
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	1,534,744	232,199
Unrealized Loss, Less than 12 Months	25,799	766
Fair Value, 12 Months or More	74,481	0
Unrealized Loss, 12 Months or More	2,722	0
Fair Value, Total	1,609,225	232,199
Unrealized Loss, Total	28,521	766
Residential MBS, Non-agency
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	12,608	2,331
Unrealized Loss, Less than 12 Months	4	128
Fair Value, 12 Months or More	0	0
Unrealized Loss, 12 Months or More	0	0
Fair Value, Total	12,608	2,331
Unrealized Loss, Total	4	128
Commercial MBS, Agency & GSE
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	582,235	89,918
Unrealized Loss, Less than 12 Months	13,098	597
Fair Value, 12 Months or More	66,014	0
Unrealized Loss, 12 Months or More	3,058	0
Fair Value, Total	648,249	89,918
Unrealized Loss, Total	16,156	597
Corporate bonds
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	149,246	1,410
Unrealized Loss, Less than 12 Months	1,811	1
Fair Value, 12 Months or More	16	0
Unrealized Loss, 12 Months or More	1	0
Fair Value, Total	149,262	1,410
Unrealized Loss, Total	1,812	1
Asset-backed securities
Summary of AFS debt securities in an unrealized loss position
Fair Value, Less than 12 Months	195,164	87,305
Unrealized Loss, Less than 12 Months	1,546	28
Fair Value, 12 Months or More	571	53,587
Unrealized Loss, 12 Months or More	1	604
Fair Value, Total	195,735	140,892
Unrealized Loss, Total	$ 1,547	$ 632

Investment Securities - Accrued

Investment Securities - Accrued interest receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued interest receivable
Accrued interest receivable	$ 42,999	$ 47,672
HTM
Accrued interest receivable
Accrued interest receivable	3,596	1,784
AFS
Accrued interest receivable
Accrued interest receivable	$ 9,868	$ 9,114

Investment Securities - Securit

Investment Securities - Securities sales activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 288,986	$ 40,625	$ 352,106
Gross gains on sales	2,346	748	1,843
Gross losses on sales	(2,263)	0	(2,864)
Net gains (losses) on sales of securities	83	748	(1,021)
Income tax expense (benefit) attributable to sales	$ (46)	$ 191	$ (247)

Investment Securities - Amortiz

Investment Securities - Amortized cost and fair value of AFS and HTM debt securities by contractual maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
AFS, Amortized Cost
AFS, Amortized Cost, Within 1 year	$ 72,726
AFS, Amortized Cost, 1 to 5 years	230,890
AFS, Amortized Cost, 5 to 10 years	394,198
AFS, Amortized Cost, More than 10 years	167,501
Amortized Cost	4,516,529	$ 3,152,111
AFS, Fair Value
AFS, Fair Value, Within 1 year	73,409
AFS, Fair Value, 1 to 5 years	232,267
AFS, Fair Value, 5 to 10 years	394,913
AFS, Fair Value, More than 10 years	172,973
Fair Value	4,496,824	3,224,721
HTM, Amortized Cost
HTM, Amortized Cost, Within 1 year	5,200
HTM, Amortized Cost, 1 to 5 years	8,762
HTM, Amortized Cost, 5 to 10 years	104,953
HTM, Amortized Cost, More than 10 years	243,756
Amortized Cost	1,156,098	420,361
HTM, Fair Value
HTM, Fair Value, Within 1 year	5,324
HTM, Fair Value, 1 to 5 years	9,548
HTM, Fair Value, 5 to 10 years	105,206
HTM, Fair Value, More than 10 years	241,774
Fair value	1,148,804	437,193
U.S. Treasuries
AFS, Amortized Cost
AFS, Amortized Cost, Within 1 year	54,974
AFS, Amortized Cost, 1 to 5 years	74,101
AFS, Amortized Cost, 5 to 10 years	88,952
Amortized Cost	218,027	123,677
AFS, Fair Value
AFS, Fair Value, Within 1 year	55,418
AFS, Fair Value, 1 to 5 years	74,800
AFS, Fair Value, 5 to 10 years	87,302
Fair Value	217,520	128,072
HTM, Amortized Cost
HTM, Amortized Cost, Within 1 year	0
HTM, Amortized Cost, 1 to 5 years	0
HTM, Amortized Cost, 5 to 10 years	19,803
Amortized Cost	19,803
HTM, Fair Value
HTM, Fair Value, Within 1 year	0
HTM, Fair Value, 1 to 5 years	0
HTM, Fair Value, 5 to 10 years	19,823
Fair value	19,823
U.S. Government agencies & GSEs
AFS, Amortized Cost
AFS, Amortized Cost, Within 1 year	87
AFS, Amortized Cost, 1 to 5 years	22,946
AFS, Amortized Cost, 5 to 10 years	79,812
AFS, Amortized Cost, More than 10 years	87,010
Amortized Cost	189,855	152,596
AFS, Fair Value
AFS, Fair Value, Within 1 year	87
AFS, Fair Value, 1 to 5 years	22,798
AFS, Fair Value, 5 to 10 years	77,606
AFS, Fair Value, More than 10 years	86,541
Fair Value	187,032	152,972
HTM, Amortized Cost
HTM, Amortized Cost, Within 1 year	0
HTM, Amortized Cost, 1 to 5 years	0
HTM, Amortized Cost, 5 to 10 years	31,962
HTM, Amortized Cost, More than 10 years	38,218
Amortized Cost	70,180	10,575
HTM, Fair Value
HTM, Fair Value, Within 1 year	0
HTM, Fair Value, 1 to 5 years	0
HTM, Fair Value, 5 to 10 years	31,578
HTM, Fair Value, More than 10 years	37,481
Fair value	69,059	10,590
State and political subdivisions
AFS, Amortized Cost
AFS, Amortized Cost, Within 1 year	15,008
AFS, Amortized Cost, 1 to 5 years	33,290
AFS, Amortized Cost, 5 to 10 years	135,265
AFS, Amortized Cost, More than 10 years	79,706
Amortized Cost	263,269	253,630
AFS, Fair Value
AFS, Fair Value, Within 1 year	15,247
AFS, Fair Value, 1 to 5 years	34,711
AFS, Fair Value, 5 to 10 years	140,348
AFS, Fair Value, More than 10 years	85,538
Fair Value	275,844	274,472
HTM, Amortized Cost
HTM, Amortized Cost, Within 1 year	5,200
HTM, Amortized Cost, 1 to 5 years	8,762
HTM, Amortized Cost, 5 to 10 years	38,188
HTM, Amortized Cost, More than 10 years	205,538
Amortized Cost	257,688	197,723
HTM, Fair Value
HTM, Fair Value, Within 1 year	5,324
HTM, Fair Value, 1 to 5 years	9,548
HTM, Fair Value, 5 to 10 years	38,784
HTM, Fair Value, More than 10 years	204,293
Fair value	257,949	205,139
Corporate bonds
AFS, Amortized Cost
AFS, Amortized Cost, Within 1 year	2,657
AFS, Amortized Cost, 1 to 5 years	100,553
AFS, Amortized Cost, 5 to 10 years	90,169
AFS, Amortized Cost, More than 10 years	785
Amortized Cost	194,164	70,057
AFS, Fair Value
AFS, Fair Value, Within 1 year	2,657
AFS, Fair Value, 1 to 5 years	99,958
AFS, Fair Value, 5 to 10 years	89,657
AFS, Fair Value, More than 10 years	894
Fair Value	193,166	71,767
HTM, Amortized Cost
HTM, Amortized Cost, Within 1 year	0
HTM, Amortized Cost, 1 to 5 years	0
HTM, Amortized Cost, 5 to 10 years	0
HTM, Amortized Cost, More than 10 years	0
HTM, Fair Value
HTM, Fair Value, Within 1 year	0
HTM, Fair Value, 1 to 5 years	0
HTM, Fair Value, 5 to 10 years	0
HTM, Fair Value, More than 10 years	0
Supranational entities
AFS, Amortized Cost
AFS, Amortized Cost, 5 to 10 years	0
AFS, Fair Value
AFS, Fair Value, 5 to 10 years	0
HTM, Amortized Cost
HTM, Amortized Cost, 5 to 10 years	15,000
Amortized Cost	15,000
HTM, Fair Value
HTM, Fair Value, 5 to 10 years	15,021
Fair value	15,021
Asset-backed securities
AFS, Amortized Cost
AFS, Amortized Cost, Not due at single maturity	603,824
Amortized Cost	603,824	562,076
AFS, Fair Value
AFS, Fair Value, Not due at single maturity	604,277
Fair Value	604,277	$ 562,722
HTM, Amortized Cost
HTM, Amortized Cost, Not due at single maturity	0
HTM, Fair Value
HTM, Fair Value, Not due at single maturity	0
Residential MBS
AFS, Amortized Cost
AFS, Amortized Cost, Not due at single maturity	2,161,625
AFS, Fair Value
AFS, Fair Value, Not due at single maturity	2,145,134
HTM, Amortized Cost
HTM, Amortized Cost, Not due at single maturity	381,641
HTM, Fair Value
HTM, Fair Value, Not due at single maturity	379,975
Commercial MBS
AFS, Amortized Cost
AFS, Amortized Cost, Not due at single maturity	885,765
AFS, Fair Value
AFS, Fair Value, Not due at single maturity	873,851
HTM, Amortized Cost
HTM, Amortized Cost, Not due at single maturity	411,786
HTM, Fair Value
HTM, Fair Value, Not due at single maturity	$ 406,977

Loans and Leases and Allowanc_3

Loans and Leases and Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 42,999	$ 47,672
Net investment in leases	37,728	36,802
TDRs	52,400	61,600
Loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	28,500	35,500
Short-term deferrals related to COVID-19 crisis	2,550	70,700
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Overdrawn deposit accounts	$ 1,010	$ 2,180

Loans and Leases and Allowanc_4

Loans and Leases and Allowance for Credit Losses - Major classifications of loan and lease portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Classifications of loans
Total loans	$ 11,760,346	$ 11,370,815
Less ACL - loans	(102,532)	(137,010)	$ (62,089)	$ (61,203)
Loans and leases, net	11,657,814	11,233,805
Loans receivable
Classifications of loans
Total loans	11,760,346	11,370,815
Loans receivable | Commercial
Classifications of loans
Total loans	8,930,556	8,960,888
Loans receivable | Commercial | Owner occupied commercial real estate
Classifications of loans
Total loans	2,321,685	2,090,443
Less ACL - loans	(14,282)	(20,673)	(11,404)	(12,207)
Loans receivable | Commercial | Income producing commercial real estate
Classifications of loans
Total loans	2,600,858	2,540,750
Less ACL - loans	(24,156)	(41,737)	(12,306)	(11,073)
Loans receivable | Commercial | Commercial & industrial
Classifications of loans
Total loans	1,910,162	2,498,560
Less ACL - loans	(16,592)	(22,019)	(5,266)	(4,802)
Loans receivable | Commercial | PPP loans included in commercial & industrial
Classifications of loans
Total loans	88,300	646,000
Loans receivable | Commercial | Construction
Classifications of loans
Total loans	1,014,830	967,305
Less ACL - loans	(9,956)	(10,952)	(9,668)	(10,337)
Loans receivable | Commercial | Equipment financing
Classifications of loans
Total loans	1,083,021	863,830
Less ACL - loans	(16,290)	(16,820)	(7,384)	(5,452)
Loans receivable | Residential | Residential mortgage
Classifications of loans
Total loans	1,637,885	1,284,920
Less ACL - loans	(12,390)	(15,341)	(8,081)	(8,295)
Loans receivable | Residential | HELOC
Classifications of loans
Total loans	694,034	697,117
Less ACL - loans	(6,568)	(8,417)	(4,575)	(4,752)
Loans receivable | Residential | Construction
Classifications of loans
Total loans	359,815	281,430
Less ACL - loans	(1,847)	(764)	(2,504)	(2,433)
Loans receivable | Consumer
Classifications of loans
Total loans	138,056	146,460
Less ACL - loans	$ (451)	$ (287)	$ (901)	$ (853)

Loans and Leases and Allowanc_5

Loans and Leases and Allowance for Credit Losses - Loans Sold (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans sold	$ 150,000	$ 75,403	$ 214,899
Guaranteed portion of SBA/USDA loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans sold	90,903	48,385	81,158
Equipment financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans sold	59,097	27,018	30,952
Indirect auto loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans sold	$ 0	$ 0	$ 102,789

Loans and Leases and Allowanc_6

Loans and Leases and Allowance for Credit Losses - Components of net investment in leases (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net Investment in Leases
Minimum future lease payments receivable	$ 39,962	$ 38,934
Estimated residual value of leased equipment	3,216	3,263
Initial direct costs	669	672
Security deposits	(687)	(727)
Purchase accounting premium	0	117
Unearned income	(5,432)	(5,457)
Net investment in leases	$ 37,728	$ 36,802

Loans and Leases and Allowanc_7

Loans and Leases and Allowance for Credit Losses - Minimum future lease payments expected to be received from equipment financing lease contracts (Details) $ in Thousands	Dec. 31, 2021USD ($)
Minimum future lease payments expected to be received
2022	$ 15,667
2023	11,601
2024	7,100
2025	4,136
2026	1,369
Thereafter	89
Total	$ 39,962

Loans and Leases and Allowanc_8

Loans and Leases and Allowance for Credit Losses - Loans by aging category and accrual status (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total loans	$ 11,760,346	$ 11,370,815
Loans receivable
Financing Receivable, Past Due [Line Items]
Total loans	11,760,346	11,370,815
Nonaccrual Loans	32,812	61,599
Loans receivable | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	11,720,062	11,288,847
Loans receivable | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	5,750	15,744
Loans receivable | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	1,722	4,625
Loans receivable | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Commercial
Financing Receivable, Past Due [Line Items]
Total loans	8,930,556	8,960,888
Nonaccrual Loans	17,815	45,515
Loans receivable | Commercial | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	8,909,189	8,905,003
Loans receivable | Commercial | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	2,172	7,459
Loans receivable | Commercial | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	1,380	2,911
Loans receivable | Commercial | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Commercial | Owner occupied commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	2,321,685	2,090,443
Nonaccrual Loans	2,714	8,582
Loans receivable | Commercial | Owner occupied commercial real estate | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	2,318,944	2,079,845
Loans receivable | Commercial | Owner occupied commercial real estate | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	27	2,013
Loans receivable | Commercial | Owner occupied commercial real estate | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	3
Loans receivable | Commercial | Owner occupied commercial real estate | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Commercial | Income producing commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	2,600,858	2,540,750
Nonaccrual Loans	7,588	15,149
Loans receivable | Commercial | Income producing commercial real estate | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	2,593,124	2,522,743
Loans receivable | Commercial | Income producing commercial real estate | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	146	1,608
Loans receivable | Commercial | Income producing commercial real estate | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	1,250
Loans receivable | Commercial | Income producing commercial real estate | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Commercial | Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans	1,910,162	2,498,560
Nonaccrual Loans	5,429	16,634
Loans receivable | Commercial | Commercial & industrial | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	1,903,730	2,480,483
Loans receivable | Commercial | Commercial & industrial | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	584	1,176
Loans receivable | Commercial | Commercial & industrial | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	419	267
Loans receivable | Commercial | Commercial & industrial | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Commercial | Construction
Financing Receivable, Past Due [Line Items]
Total loans	1,014,830	967,305
Nonaccrual Loans	343	1,745
Loans receivable | Commercial | Construction | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	1,014,211	964,947
Loans receivable | Commercial | Construction | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	231
Loans receivable | Commercial | Construction | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	276	382
Loans receivable | Commercial | Construction | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Commercial | Equipment financing
Financing Receivable, Past Due [Line Items]
Total loans	1,083,021	863,830
Nonaccrual Loans	1,741	3,405
Loans receivable | Commercial | Equipment financing | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	1,079,180	856,985
Loans receivable | Commercial | Equipment financing | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	1,415	2,431
Loans receivable | Commercial | Equipment financing | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	685	1,009
Loans receivable | Commercial | Equipment financing | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Residential | Residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	1,637,885	1,284,920
Nonaccrual Loans	13,313	12,858
Loans receivable | Residential | Residential mortgage | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	1,622,754	1,265,019
Loans receivable | Residential | Residential mortgage | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	1,583	5,549
Loans receivable | Residential | Residential mortgage | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	235	1,494
Loans receivable | Residential | Residential mortgage | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Residential | HELOC
Financing Receivable, Past Due [Line Items]
Total loans	694,034	697,117
Nonaccrual Loans	1,212	2,487
Loans receivable | Residential | HELOC | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	691,814	692,504
Loans receivable | Residential | HELOC | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	920	1,942
Loans receivable | Residential | HELOC | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	88	184
Loans receivable | Residential | HELOC | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Residential | Construction
Financing Receivable, Past Due [Line Items]
Total loans	359,815	281,430
Nonaccrual Loans	420	514
Loans receivable | Residential | Construction | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	358,741	280,551
Loans receivable | Residential | Construction | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	654	365
Loans receivable | Residential | Construction | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Residential | Construction | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Loans receivable | Consumer
Financing Receivable, Past Due [Line Items]
Total loans	138,056	146,460
Nonaccrual Loans	52	225
Loans receivable | Consumer | Current Loans
Financing Receivable, Past Due [Line Items]
Total loans	137,564	145,770
Loans receivable | Consumer | Loans Past Due, 30 - 59 Days
Financing Receivable, Past Due [Line Items]
Total loans	421	429
Loans receivable | Consumer | Loans Past Due, 60 - 89 Days
Financing Receivable, Past Due [Line Items]
Total loans	19	36
Loans receivable | Consumer | Loans Past Due, over 90 Days
Financing Receivable, Past Due [Line Items]
Total loans	$ 0	$ 0

Loans and Leases and Allowanc_9

Loans and Leases and Allowance for Credit Losses - Nonaccrual loans by loan class (Details) - Loans receivable - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Nonaccrual loans
Nonaccrual loans with no allowance	$ 16,360	$ 23,760
Nonaccrual loans with an allowance	16,452	37,839
Nonaccrual Loans	32,812	61,599
Commercial
Nonaccrual loans
Nonaccrual loans with no allowance	12,729	20,121
Nonaccrual loans with an allowance	5,086	25,394
Nonaccrual Loans	17,815	45,515
Commercial | Owner occupied commercial real estate
Nonaccrual loans
Nonaccrual loans with no allowance	2,141	6,614
Nonaccrual loans with an allowance	573	1,968
Nonaccrual Loans	2,714	8,582
Commercial | Income producing commercial real estate
Nonaccrual loans
Nonaccrual loans with no allowance	6,873	10,008
Nonaccrual loans with an allowance	715	5,141
Nonaccrual Loans	7,588	15,149
Commercial | Commercial & industrial
Nonaccrual loans
Nonaccrual loans with no allowance	3,715	2,004
Nonaccrual loans with an allowance	1,714	14,630
Nonaccrual Loans	5,429	16,634
Commercial | Construction
Nonaccrual loans
Nonaccrual loans with no allowance	0	1,339
Nonaccrual loans with an allowance	343	406
Nonaccrual Loans	343	1,745
Commercial | Equipment financing
Nonaccrual loans
Nonaccrual loans with no allowance	0	156
Nonaccrual loans with an allowance	1,741	3,249
Nonaccrual Loans	1,741	3,405
Residential | Residential mortgage
Nonaccrual loans
Nonaccrual loans with no allowance	3,126	1,855
Nonaccrual loans with an allowance	10,187	11,003
Nonaccrual Loans	13,313	12,858
Residential | HELOC
Nonaccrual loans
Nonaccrual loans with no allowance	219	1,329
Nonaccrual loans with an allowance	993	1,158
Nonaccrual Loans	1,212	2,487
Residential | Construction
Nonaccrual loans
Nonaccrual loans with no allowance	280	274
Nonaccrual loans with an allowance	140	240
Nonaccrual Loans	420	514
Consumer
Nonaccrual loans
Nonaccrual loans with no allowance	6	181
Nonaccrual loans with an allowance	46	44
Nonaccrual Loans	$ 52	$ 225

Loans and Leases and Allowan_10

Loans and Leases and Allowance for Credit Losses - Risk category of term loans by vintage year (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	$ 4,181,120	$ 4,219,098
Originated in prior year	2,679,991	1,865,899
Originated two years prior	1,302,346	1,433,719
Originated three years prior	785,543	874,745
Originated four years prior	529,286	759,094
Originated five or more years prior	869,486	789,304
Revolvers	1,352,903	1,368,554
Revolvers converted to term loans	59,671	60,402
Total loans	11,760,346	11,370,815
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	4,056,001	4,093,543
Originated in prior year	2,613,439	1,773,077
Originated two years prior	1,230,851	1,352,195
Originated three years prior	686,372	815,046
Originated four years prior	467,977	669,394
Originated five or more years prior	805,770	753,530
Revolvers	1,345,755	1,338,027
Revolvers converted to term loans	54,067	52,038
Total loans	11,260,232	10,846,850
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	87,231	67,047
Originated in prior year	48,922	63,506
Originated two years prior	54,403	47,167
Originated three years prior	49,742	47,185
Originated four years prior	36,461	47,536
Originated five or more years prior	24,876	16,559
Revolvers	2,490	6,564
Revolvers converted to term loans	286	1,681
Total loans	304,411	297,245
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	37,888	58,508
Originated in prior year	17,630	29,316
Originated two years prior	17,092	34,357
Originated three years prior	49,429	12,514
Originated four years prior	24,848	42,164
Originated five or more years prior	38,840	19,215
Revolvers	4,658	23,963
Revolvers converted to term loans	5,318	6,683
Total loans	195,703	226,720
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	2,892,353	3,343,874
Originated in prior year	2,197,828	1,521,690
Originated two years prior	1,109,201	1,208,471
Originated three years prior	614,611	685,027
Originated four years prior	391,842	540,614
Originated five or more years prior	573,932	508,536
Revolvers	636,889	620,686
Revolvers converted to term loans	35,014	28,924
Total loans	8,451,670	8,457,822
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	87,231	67,047
Originated in prior year	48,922	63,506
Originated two years prior	54,403	47,167
Originated three years prior	49,742	47,185
Originated four years prior	36,461	47,536
Originated five or more years prior	24,876	16,559
Revolvers	2,490	6,564
Revolvers converted to term loans	286	1,681
Total loans	304,411	297,245
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	34,105	56,353
Originated in prior year	16,029	27,076
Originated two years prior	14,227	31,080
Originated three years prior	46,123	11,081
Originated four years prior	23,621	41,283
Originated five or more years prior	33,740	12,877
Revolvers	4,326	23,698
Revolvers converted to term loans	2,304	2,373
Total loans	174,475	205,821
Commercial | Owner occupied commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	643,151	707,501
Originated in prior year	674,124	368,615
Originated two years prior	278,702	231,316
Originated three years prior	153,233	197,778
Originated four years prior	139,584	201,362
Originated five or more years prior	267,460	229,667
Revolvers	68,354	56,273
Revolvers converted to term loans	17,150	9,072
Total loans	2,241,758	2,001,584
Commercial | Owner occupied commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	7,772	8,759
Originated in prior year	2,979	4,088
Originated two years prior	16,639	4,221
Originated three years prior	4,374	10,025
Originated four years prior	6,007	11,138
Originated five or more years prior	2,641	4,728
Revolvers	248	100
Revolvers converted to term loans	286	0
Total loans	40,946	43,059
Commercial | Owner occupied commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	11,987	6,586
Originated in prior year	1,049	10,473
Originated two years prior	4,216	7,596
Originated three years prior	3,712	3,717
Originated four years prior	5,829	6,753
Originated five or more years prior	11,088	8,473
Revolvers	0	1,528
Revolvers converted to term loans	1,100	674
Total loans	38,981	45,800
Commercial | Income producing commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	668,322	815,799
Originated in prior year	678,487	376,911
Originated two years prior	333,911	361,539
Originated three years prior	221,218	277,769
Originated four years prior	165,563	206,068
Originated five or more years prior	219,459	198,080
Revolvers	41,157	28,542
Revolvers converted to term loans	11,830	12,128
Total loans	2,339,947	2,276,836
Commercial | Income producing commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	64,139	35,471
Originated in prior year	27,875	42,831
Originated two years prior	21,875	39,954
Originated three years prior	22,292	13,238
Originated four years prior	18,415	24,164
Originated five or more years prior	21,880	11,337
Revolvers	0	0
Revolvers converted to term loans	0	1,681
Total loans	176,476	168,676
Commercial | Income producing commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	15,485	45,125
Originated in prior year	12,618	8,940
Originated two years prior	3,779	2,179
Originated three years prior	29,212	5,034
Originated four years prior	6,726	31,211
Originated five or more years prior	16,531	2,652
Revolvers	0	0
Revolvers converted to term loans	84	97
Total loans	84,435	95,238
Commercial | Commercial & industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	638,567	1,092,767
Originated in prior year	270,150	287,857
Originated two years prior	178,944	263,439
Originated three years prior	136,281	115,790
Originated four years prior	50,567	92,968
Originated five or more years prior	72,904	58,359
Revolvers	514,750	515,593
Revolvers converted to term loans	4,361	3,777
Total loans	1,866,524	2,430,550
Commercial | Commercial & industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,037	1,451
Originated in prior year	1,831	16,315
Originated two years prior	2,740	2,176
Originated three years prior	597	630
Originated four years prior	273	459
Originated five or more years prior	303	17
Revolvers	2,242	6,464
Revolvers converted to term loans	0	0
Total loans	9,023	27,512
Commercial | Commercial & industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	2,741	1,545
Originated in prior year	1,615	5,536
Originated two years prior	5,284	6,193
Originated three years prior	12,685	1,684
Originated four years prior	1,232	1,292
Originated five or more years prior	5,863	1,485
Revolvers	4,326	22,170
Revolvers converted to term loans	869	593
Total loans	34,615	40,498
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	378,695	314,154
Originated in prior year	303,154	217,643
Originated two years prior	149,740	226,308
Originated three years prior	40,625	53,708
Originated four years prior	22,983	30,812
Originated five or more years prior	13,206	21,985
Revolvers	12,628	20,278
Revolvers converted to term loans	1,673	3,947
Total loans	922,704	888,835
Commercial | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	14,283	21,366
Originated in prior year	16,237	272
Originated two years prior	13,149	816
Originated three years prior	22,479	23,292
Originated four years prior	11,766	11,775
Originated five or more years prior	52	477
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	77,966	57,998
Commercial | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	3,464	2,466
Originated in prior year	157	735
Originated two years prior	272	13,741
Originated three years prior	11	340
Originated four years prior	9,750	1,931
Originated five or more years prior	255	250
Revolvers	0	0
Revolvers converted to term loans	251	1,009
Total loans	14,160	20,472
Commercial | Equipment financing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	563,618	413,653
Originated in prior year	271,913	270,664
Originated two years prior	167,904	125,869
Originated three years prior	63,254	39,982
Originated four years prior	13,145	9,404
Originated five or more years prior	903	445
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	1,080,737	860,017
Commercial | Equipment financing | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	0	0
Commercial | Equipment financing | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	428	631
Originated in prior year	590	1,392
Originated two years prior	676	1,371
Originated three years prior	503	306
Originated four years prior	84	96
Originated five or more years prior	3	17
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	2,284	3,813
Residential | Residential mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	781,007	468,945
Originated in prior year	370,092	195,213
Originated two years prior	108,091	125,492
Originated three years prior	64,346	120,944
Originated four years prior	71,552	122,013
Originated five or more years prior	221,131	230,771
Revolvers	9	18
Revolvers converted to term loans	3,915	5,393
Total loans	1,620,143	1,268,789
Residential | Residential mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	0	0
Residential | Residential mortgage | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	3,339	2,049
Originated in prior year	1,585	2,106
Originated two years prior	2,813	3,174
Originated three years prior	3,229	1,369
Originated four years prior	1,205	679
Originated five or more years prior	4,744	5,860
Revolvers	0	0
Revolvers converted to term loans	827	894
Total loans	17,742	16,131
Residential | HELOC | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	676,545	675,878
Revolvers converted to term loans	14,994	17,581
Total loans	691,539	693,459
Residential | HELOC | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	0	0
Residential | HELOC | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	329	265
Revolvers converted to term loans	2,166	3,393
Total loans	2,495	3,658
Residential | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	325,111	225,727
Originated in prior year	16,301	30,646
Originated two years prior	2,802	4,026
Originated three years prior	2,278	4,544
Originated four years prior	3,144	3,172
Originated five or more years prior	9,352	12,546
Revolvers	0	0
Revolvers converted to term loans	33	64
Total loans	359,021	280,725
Residential | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	0	0
Residential | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	407	106
Originated in prior year	0	37
Originated two years prior	30	54
Originated three years prior	51	4
Originated four years prior	0	124
Originated five or more years prior	306	380
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	794	705
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	57,530	54,997
Originated in prior year	29,218	25,528
Originated two years prior	10,757	14,206
Originated three years prior	5,137	4,531
Originated four years prior	1,439	3,595
Originated five or more years prior	1,355	1,677
Revolvers	32,312	41,445
Revolvers converted to term loans	111	76
Total loans	137,859	146,055
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated in prior year	0	0
Originated two years prior	0	0
Originated three years prior	0	0
Originated four years prior	0	0
Originated five or more years prior	0	0
Revolvers	0	0
Revolvers converted to term loans	0	0
Total loans	0	0
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	37	0
Originated in prior year	16	97
Originated two years prior	22	49
Originated three years prior	26	60
Originated four years prior	22	78
Originated five or more years prior	50	98
Revolvers	3	0
Revolvers converted to term loans	21	23
Total loans	$ 197	$ 405

Loans and Leases and Allowan_11

Loans and Leases and Allowance for Credit Losses - Loans modified under terms of TDR (Details) - Loans receivable $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)contract	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	92	252	55
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 9,711	$ 25,932	$ 14,340
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	24	30	2
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 1,235	$ 7,969	$ 148
Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	7,854	17,585	14,005
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 1,857	$ 8,347	$ 335
Indirect auto
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract			15
Post-Modification Outstanding Recorded Investment by Type of Modification			$ 262
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract			0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment			$ 0
Indirect auto | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification			0
Indirect auto | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification			0
Indirect auto | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification			$ 262
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	76	198	18
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 8,126	$ 21,248	$ 11,905
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	18	26	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 550	$ 7,761	$ 0
Commercial | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Commercial | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	6,326	12,928	11,898
Commercial | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 1,800	$ 8,320	$ 7
Commercial | Owner occupied commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	8	4
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 731	$ 2,369	$ 1,739
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	1	0	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 99	$ 0	$ 0
Commercial | Owner occupied commercial real estate | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Commercial | Owner occupied commercial real estate | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	731	833	1,739
Commercial | Owner occupied commercial real estate | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 1,536	$ 0
Commercial | Income producing commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3	7	3
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 1,697	$ 11,555	$ 9,013
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	0	1	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 0	$ 5,998	$ 0
Commercial | Income producing commercial real estate | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Commercial | Income producing commercial real estate | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	4,856	9,013
Commercial | Income producing commercial real estate | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 1,697	$ 6,699	$ 0
Commercial | Commercial & industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	8	4	2
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 700	$ 601	$ 82
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	2	3	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 76	$ 819	$ 0
Commercial | Commercial & industrial | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Commercial | Commercial & industrial | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	597	586	75
Commercial | Commercial & industrial | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 103	$ 15	$ 7
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	7	0
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 309	$ 902	$ 0
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	0	0	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 0	$ 0	$ 0
Commercial | Construction | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Commercial | Construction | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	309	832	0
Commercial | Construction | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 70	$ 0
Commercial | Equipment financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	62	172	9
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 4,689	$ 5,821	$ 1,071
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	15	22	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 375	$ 944	$ 0
Commercial | Equipment financing | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Commercial | Equipment financing | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	4,689	5,821	1,071
Commercial | Equipment financing | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0		$ 0
Residential | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	16	40	15
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 1,585	$ 4,362	$ 2,057
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	4	2	1
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 593	$ 145	$ 135
Residential | Residential mortgage | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Residential | Residential mortgage | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	1,528	4,359	2,057
Residential | Residential mortgage | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 57	$ 3	$ 0
Residential | HELOC
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	4	1
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 164	$ 50
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	2	1	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 92	$ 60	$ 0
Residential | HELOC | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Residential | HELOC | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	164	50
Residential | HELOC | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 0	$ 0
Residential | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	3	1
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 123	$ 21
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	0	0	1
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 0	$ 0	$ 13
Residential | Construction | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Residential | Construction | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	123	0
Residential | Construction | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 0	$ 21
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	7	5
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 35	$ 45
TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts | contract	0	1	0
TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment	$ 0	$ 3	$ 0
Consumer | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	0	0
Consumer | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	0	11	0
Consumer | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment by Type of Modification	$ 0	$ 24	$ 45

Loans and Leases and Allowan_12

Loans and Leases and Allowance for Credit Losses - Balance and activity in the ACL by portfolio segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Credit Loss
ACL - loans, Beginning Balance	$ 137,010	$ 62,089	$ 61,203
ACL- loans, Initial ACL - PCD loans	3,544	11,152
ACL - loans, Charge-Offs	(15,273)	(32,394)	(18,017)
ACL - loans, Recoveries	15,235	14,078	5,801
ACL - loans, (Release) Provision	(37,984)	75,205	13,102
ACL - loans, Ending Balance	102,532	137,010	62,089
ACL - unfunded commitments, Beginning Balance	10,558	3,458	3,410
ACL - unfunded commitments, (Release) Provision	434	5,229	48
ACL - unfunded commitments, Ending Balance	10,992	10,558	3,458
Total ACL, Beginning Balance	147,568	65,547	64,613
Total ACL, Initial ACL - PCD loans	3,544	11,152
Total ACL, Charge-Offs	(15,273)	(32,394)	(18,017)
Total ACL, Recoveries	15,235	14,078	5,801
Total ACL, (Release) Provision	(37,550)	80,434	13,150
Total ACL, Ending Balance	113,524	147,568	65,547
Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		6,880
ACL - loans, Ending Balance			6,880
ACL - unfunded commitments, Beginning Balance		1,871
ACL - unfunded commitments, Ending Balance			1,871
Total ACL, Beginning Balance		8,751
Total ACL, Ending Balance			8,751
Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		68,969
ACL - loans, Ending Balance			68,969
ACL - unfunded commitments, Beginning Balance		5,329
ACL - unfunded commitments, Ending Balance			5,329
Total ACL, Beginning Balance		74,298
Total ACL, Ending Balance			74,298
Loans receivable | Indirect auto
Allowance for Credit Loss
ACL - loans, Beginning Balance		0	999
ACL - loans, Charge-Offs			(663)
ACL - loans, Recoveries			186
ACL - loans, (Release) Provision			(522)
ACL - loans, Ending Balance			0
Loans receivable | Commercial | Owner occupied commercial real estate
Allowance for Credit Loss
ACL - loans, Beginning Balance	20,673	11,404	12,207
ACL- loans, Initial ACL - PCD loans	280	1,779
ACL - loans, Charge-Offs	(1,640)	(70)	(5)
ACL - loans, Recoveries	1,324	2,565	375
ACL - loans, (Release) Provision	(6,355)	6,611	(1,173)
ACL - loans, Ending Balance	14,282	20,673	11,404
Loans receivable | Commercial | Owner occupied commercial real estate | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		(1,616)
ACL - loans, Ending Balance			(1,616)
Loans receivable | Commercial | Owner occupied commercial real estate | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		9,788
ACL - loans, Ending Balance			9,788
Loans receivable | Commercial | Income producing commercial real estate
Allowance for Credit Loss
ACL - loans, Beginning Balance	41,737	12,306	11,073
ACL- loans, Initial ACL - PCD loans	982	1,208
ACL - loans, Charge-Offs	(267)	(8,430)	(1,227)
ACL - loans, Recoveries	496	3,546	283
ACL - loans, (Release) Provision	(18,792)	33,137	2,177
ACL - loans, Ending Balance	24,156	41,737	12,306
Loans receivable | Commercial | Income producing commercial real estate | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		(30)
ACL - loans, Ending Balance			(30)
Loans receivable | Commercial | Income producing commercial real estate | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		12,276
ACL - loans, Ending Balance			12,276
Loans receivable | Commercial | Commercial & industrial
Allowance for Credit Loss
ACL - loans, Beginning Balance	22,019	5,266	4,802
ACL- loans, Initial ACL - PCD loans	312	7,680
ACL - loans, Charge-Offs	(4,776)	(10,707)	(5,849)
ACL - loans, Recoveries	7,275	1,371	852
ACL - loans, (Release) Provision	(8,238)	14,397	5,461
ACL - loans, Ending Balance	16,592	22,019	5,266
Loans receivable | Commercial | Commercial & industrial | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		4,012
ACL - loans, Ending Balance			4,012
Loans receivable | Commercial | Commercial & industrial | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		9,278
ACL - loans, Ending Balance			9,278
Loans receivable | Commercial | Construction
Allowance for Credit Loss
ACL - loans, Beginning Balance	10,952	9,668	10,337
ACL- loans, Initial ACL - PCD loans	1,969	74
ACL - loans, Charge-Offs	(334)	(726)	(290)
ACL - loans, Recoveries	1,081	1,045	1,165
ACL - loans, (Release) Provision	(3,712)	3,474	(1,544)
ACL - loans, Ending Balance	9,956	10,952	9,668
Loans receivable | Commercial | Construction | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		(2,583)
ACL - loans, Ending Balance			(2,583)
Loans receivable | Commercial | Construction | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		7,085
ACL - loans, Ending Balance			7,085
Loans receivable | Commercial | Equipment financing
Allowance for Credit Loss
ACL - loans, Beginning Balance	16,820	7,384	5,452
ACL- loans, Initial ACL - PCD loans	0	0
ACL - loans, Charge-Offs	(5,724)	(8,764)	(5,675)
ACL - loans, Recoveries	2,619	2,004	781
ACL - loans, (Release) Provision	2,575	10,325	6,826
ACL - loans, Ending Balance	16,290	16,820	7,384
Loans receivable | Commercial | Equipment financing | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		5,871
ACL - loans, Ending Balance			5,871
Loans receivable | Commercial | Equipment financing | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		13,255
ACL - loans, Ending Balance			13,255
Loans receivable | Residential | Residential mortgage
Allowance for Credit Loss
ACL - loans, Beginning Balance	15,341	8,081	8,295
ACL- loans, Initial ACL - PCD loans	0	195
ACL - loans, Charge-Offs	(344)	(398)	(616)
ACL - loans, Recoveries	564	455	481
ACL - loans, (Release) Provision	(3,171)	5,439	(79)
ACL - loans, Ending Balance	12,390	15,341	8,081
Loans receivable | Residential | Residential mortgage | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		1,569
ACL - loans, Ending Balance			1,569
Loans receivable | Residential | Residential mortgage | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		9,650
ACL - loans, Ending Balance			9,650
Loans receivable | Residential | HELOC
Allowance for Credit Loss
ACL - loans, Beginning Balance	8,417	4,575	4,752
ACL- loans, Initial ACL - PCD loans	1	209
ACL - loans, Charge-Offs	(112)	(221)	(996)
ACL - loans, Recoveries	517	677	610
ACL - loans, (Release) Provision	(2,255)	1,258	209
ACL - loans, Ending Balance	6,568	8,417	4,575
Loans receivable | Residential | HELOC | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		1,919
ACL - loans, Ending Balance			1,919
Loans receivable | Residential | HELOC | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		6,494
ACL - loans, Ending Balance			6,494
Loans receivable | Residential | Construction
Allowance for Credit Loss
ACL - loans, Beginning Balance	764	2,504	2,433
ACL- loans, Initial ACL - PCD loans	0	0
ACL - loans, Charge-Offs	(10)	(93)	(306)
ACL - loans, Recoveries	157	156	157
ACL - loans, (Release) Provision	936	(32)	220
ACL - loans, Ending Balance	1,847	764	2,504
Loans receivable | Residential | Construction | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		(1,771)
ACL - loans, Ending Balance			(1,771)
Loans receivable | Residential | Construction | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		733
ACL - loans, Ending Balance			733
Loans receivable | Consumer
Allowance for Credit Loss
ACL - loans, Beginning Balance	287	901	853
ACL- loans, Initial ACL - PCD loans	0	7
ACL - loans, Charge-Offs	(2,066)	(2,985)	(2,390)
ACL - loans, Recoveries	1,202	2,259	911
ACL - loans, (Release) Provision	1,028	596	1,527
ACL - loans, Ending Balance	$ 451	287	901
Loans receivable | Consumer | Adoption of CECL
Allowance for Credit Loss
ACL - loans, Beginning Balance		(491)
ACL - loans, Ending Balance			(491)
Loans receivable | Consumer | Adjusted Balance
Allowance for Credit Loss
ACL - loans, Beginning Balance		$ 410
ACL - loans, Ending Balance			$ 410

Premises and Equipment - Summar

Premises and Equipment - Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Premises and equipments
Premises and equipment, gross	$ 394,661	$ 360,060
Less accumulated depreciation	(149,365)	(141,571)
Premises and equipment, net	245,296	218,489
Land and land improvements
Premises and equipments
Premises and equipment, gross	95,029	82,816
Buildings and improvements
Premises and equipments
Premises and equipment, gross	189,339	173,497
Furniture and equipment
Premises and equipments
Premises and equipment, gross	100,205	96,157
Construction in progress
Premises and equipments
Premises and equipment, gross	$ 10,088	$ 7,590

Premises and Equipment - Narrat

Premises and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 15.7	$ 15.6	$ 15.3

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Fair value of derivative financial instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Notional Amount	$ 3,052,601	$ 3,529,643
Derivative Assets
Total gross derivative instruments	42,480	86,666
Less: Amounts subject to master netting agreements	(694)	(114)
Less: Cash collateral received/pledged	(6,620)	(3,200)
Net amount	35,166	83,352
Derivative Liabilities
Total gross derivative instruments	25,145	29,003
Less: Amounts subject to master netting agreements	(694)	(114)
Less: Cash collateral received/pledged	(14,148)	(27,092)
Net amount	10,303	1,797
Derivative assets
Derivative Assets
Total gross derivative instruments	42,480	86,666
Derivative liabilities
Derivative Liabilities
Total gross derivative instruments	25,145	29,003
Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Notional Amount	130,000	140,000
Designated as hedging instrument | Cash flow hedge of subordinated debt
Derivatives, Fair Value [Line Items]
Notional Amount	100,000	100,000
Designated as hedging instrument | Cash flow hedge of trust preferred securities
Derivatives, Fair Value [Line Items]
Notional Amount	20,000	20,000
Designated as hedging instrument | Fair value hedge of brokered CDs
Derivatives, Fair Value [Line Items]
Notional Amount	10,000	20,000
Designated as hedging instrument | Derivative assets
Derivative Assets
Derivatives designated as hedging instruments	6,389	3,378
Designated as hedging instrument | Derivative assets | Cash flow hedge of subordinated debt
Derivative Assets
Cash flow hedge	6,389	3,378
Designated as hedging instrument | Derivative assets | Cash flow hedge of trust preferred securities
Derivative Assets
Cash flow hedge	0	0
Designated as hedging instrument | Derivative assets | Fair value hedge of brokered CDs
Derivative Assets
Fair value hedge	0	0
Designated as hedging instrument | Derivative liabilities
Derivative Liabilities
Derivatives designated as hedging instruments	0	0
Designated as hedging instrument | Derivative liabilities | Cash flow hedge of subordinated debt
Derivative Liabilities
Cash flow hedge	0	0
Designated as hedging instrument | Derivative liabilities | Cash flow hedge of trust preferred securities
Derivative Liabilities
Cash flow hedge	0	0
Designated as hedging instrument | Derivative liabilities | Fair value hedge of brokered CDs
Derivative Liabilities
Fair value hedge	0	0
Not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Notional Amount	2,922,601	3,389,643
Not designated as hedging instrument | Customer derivative positions
Derivatives, Fair Value [Line Items]
Notional Amount	1,206,145	1,329,271
Not designated as hedging instrument | Dealer offsets to customer derivative positions
Derivatives, Fair Value [Line Items]
Notional Amount	1,230,885	1,329,271
Not designated as hedging instrument | Risk participations
Derivatives, Fair Value [Line Items]
Notional Amount	69,385	48,843
Not designated as hedging instrument | Mortgage banking - loan commitment
Derivatives, Fair Value [Line Items]
Notional Amount	110,897	253,243
Not designated as hedging instrument | Mortgage banking - forward sales commitment
Derivatives, Fair Value [Line Items]
Notional Amount	201,419	325,145
Not designated as hedging instrument | Bifurcated embedded derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	51,935	51,935
Not designated as hedging instrument | Dealer offsets to bifurcated embedded derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	51,935	51,935
Not designated as hedging instrument | Derivative assets
Derivative Assets
Derivatives not designated as hedging instruments	36,091	83,288
Not designated as hedging instrument | Derivative assets | Customer derivative positions
Derivative Assets
Derivatives not designated as hedging instruments	28,656	72,508
Not designated as hedging instrument | Derivative assets | Dealer offsets to customer derivative positions
Derivative Assets
Derivatives not designated as hedging instruments	974	1
Not designated as hedging instrument | Derivative assets | Risk participations
Derivative Assets
Derivatives not designated as hedging instruments	16	28
Not designated as hedging instrument | Derivative assets | Mortgage banking - loan commitment
Derivative Assets
Derivatives not designated as hedging instruments	3,450	10,751
Not designated as hedging instrument | Derivative assets | Mortgage banking - forward sales commitment
Derivative Assets
Derivatives not designated as hedging instruments	67	0
Not designated as hedging instrument | Derivative assets | Bifurcated embedded derivatives
Derivative Assets
Derivatives not designated as hedging instruments	2,928	0
Not designated as hedging instrument | Derivative assets | Dealer offsets to bifurcated embedded derivatives
Derivative Assets
Derivatives not designated as hedging instruments	0	0
Not designated as hedging instrument | Derivative liabilities
Derivative Liabilities
Derivatives not designated as hedging instruments	25,145	29,003
Not designated as hedging instrument | Derivative liabilities | Customer derivative positions
Derivative Liabilities
Derivatives not designated as hedging instruments	10,663	17
Not designated as hedging instrument | Derivative liabilities | Dealer offsets to customer derivative positions
Derivative Liabilities
Derivatives not designated as hedging instruments	9,232	24,614
Not designated as hedging instrument | Derivative liabilities | Risk participations
Derivative Liabilities
Derivatives not designated as hedging instruments	7	12
Not designated as hedging instrument | Derivative liabilities | Mortgage banking - loan commitment
Derivative Liabilities
Derivatives not designated as hedging instruments	0	0
Not designated as hedging instrument | Derivative liabilities | Mortgage banking - forward sales commitment
Derivative Liabilities
Derivatives not designated as hedging instruments	202	1,964
Not designated as hedging instrument | Derivative liabilities | Bifurcated embedded derivatives
Derivative Liabilities
Derivatives not designated as hedging instruments	0	1,449
Not designated as hedging instrument | Derivative liabilities | Dealer offsets to bifurcated embedded derivatives
Derivative Liabilities
Derivatives not designated as hedging instruments	$ 5,041	$ 947

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Narrative (Details) $ in Thousands	Dec. 31, 2021USD ($)contract
Derivative Instruments [Line Items]
Losses to be reclassified from accumulated other comprehensive income into earnings over the next twelve months | $	$ 523
Not designated as hedging instrument, economic hedge | Interest rate swaps
Derivative Instruments [Line Items]
Number of derivative contracts | contract	3

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Effect of derivatives in hedging relationships (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments [Line Items]
Total interest expense presented in the consolidated statements of income	$ (29,760)	$ (56,237)	$ (83,312)
Fair value hedging | Interest expense
Effect of hedging relationships on interest expense:
Net income (expense) recognized	210	281	(360)
Cash flow hedging | Interest expense
Effect of hedging relationships on interest expense:
Net income (expense) recognized	(608)	(359)	$ 0
Premium amortization expense excluded from assessment of hedge effectiveness	$ 472	$ 329

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Carrying amount and hedge accounting basis adjustment (Details) - Fair value hedging - Interest rate swaps - Deposits - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Carrying amount of Assets (Liabilities)	$ (10,026)	$ (20,216)
Hedge Accounting Basis Adjustment	$ (28)	$ (235)

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities - Gains and losses recognized in income on derivatives not designated as hedging instruments (Details) - Not designated as hedging instrument - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments [Line Items]
Total gains and losses	$ 1,840	$ (1,544)	$ 1,097
Customer derivatives and dealer offsets | Other noninterest income
Derivative Instruments [Line Items]
Total gains and losses	3,302	6,732	2,878
Bifurcated embedded derivatives and dealer offsets | Other noninterest income
Derivative Instruments [Line Items]
Total gains and losses	433	(63)	212
De-designated hedges | Other noninterest income
Derivative Instruments [Line Items]
Total gains and losses	0	0	(193)
Mortgage banking derivatives | Mortgage loan revenue
Derivative Instruments [Line Items]
Total gains and losses	(1,805)	(7,873)	(1,797)
Risk participations | Other noninterest income
Derivative Instruments [Line Items]
Total gains and losses	$ (90)	$ (340)	$ (3)

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Carrying amount (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and other intangible assets
Total intangibles subject to amortization, net	$ 20,400	$ 14,014
Goodwill	452,007	367,809	$ 327,425
Total goodwill and other intangible assets, net	472,407	381,823
Core deposit intangible
Goodwill and other intangible assets
Intangibles subject to amortization, gross	38,192	36,162
Less: accumulated amortization	(25,870)	(22,148)
Total intangibles subject to amortization, net	12,322	14,014
Customer relationship intangible
Goodwill and other intangible assets
Intangibles subject to amortization, gross	8,400	0
Less: accumulated amortization	(322)	0
Total intangibles subject to amortization, net	$ 8,078	$ 0

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Intangible asset acquired	$ 870

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Changes in carrying amount of goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in carrying amount of goodwill
Goodwill, beginning balance	$ 367,809	$ 327,425
Goodwill, ending balance	452,007	367,809
Accumulated impairment losses	306,000	306,000	$ 306,000
Gross goodwill	758,000	673,000	$ 633,000
Three Shores
Changes in carrying amount of goodwill
Acquisitions		$ 40,384
FinTrust
Changes in carrying amount of goodwill
Acquisitions	14,163
Aquesta
Changes in carrying amount of goodwill
Acquisitions	$ 70,035

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Estimated aggregate amortization expense for future periods (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Estimated aggregate amortization expense for future periods
2022	$ 4,081
2023	3,447
2024	2,849
2025	2,169
2026	1,709
Thereafter	6,145
Total intangibles subject to amortization, net	$ 20,400	$ 14,014

Servicing Assets and Liabilit_3

Servicing Assets and Liabilities - Changes in SBA/USDA loans servicing rights (Details) - SBA/USDA loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing rights roll forward
Beginning of period	$ 6,462	$ 6,794	$ 7,510
Acquired servicing rights	581	0	0
Originated servicing rights capitalized upon sale of loans	2,005	1,114	1,835
Disposals	(1,430)	(624)	(1,258)
Changes in fair value due to change in inputs or assumptions used in the valuation	(1,105)	(822)	(1,293)
End of period	$ 6,513	$ 6,462	$ 6,794

Servicing Assets and Liabilit_4

Servicing Assets and Liabilities - Key characteristics, inputs, and economic assumptions for SBA/USDA loans and related sensitivity (Details) - SBA/USDA loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]
Fair value of retained servicing assets	$ 6,513	$ 6,462	$ 6,794	$ 7,510
10% adverse change	(309)	(358)
20% adverse change	(591)	(680)
100 bps adverse change	(166)	(171)
200 bps adverse change	$ (323)	$ (333)
Weighted average
Servicing Assets at Fair Value [Line Items]
Prepayment rate assumption	16.30%	17.80%
Discount rate	10.30%	8.90%
Minimum
Servicing Assets at Fair Value [Line Items]
Prepayment rate assumption	3.20%	2.70%
Discount rate	0.00%	1.60%
Maximum
Servicing Assets at Fair Value [Line Items]
Prepayment rate assumption	31.30%	33.60%
Discount rate	45.40%	44.10%

Servicing Assets and Liabilit_5

Servicing Assets and Liabilities - Changes in residential mortgage loans servicing rights (Details) - Residential mortgage servicing rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing rights roll forward
Beginning of period	$ 16,216	$ 13,565	$ 11,877
Originated servicing rights capitalized upon sale of loans	12,510	11,911	5,783
Disposals	(4,275)	(2,868)	(1,098)
Changes in fair value due to change in inputs or assumptions used in the valuation	710	(6,392)	(2,997)
End of period	$ 25,161	$ 16,216	$ 13,565

Servicing Assets and Liabilit_6

Servicing Assets and Liabilities - Key characteristics, inputs, and economic assumptions for residential mortgage loans and related sensitivity (Details) - Residential mortgage servicing rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]
Fair value of retained servicing assets	$ 25,161	$ 16,216	$ 13,565	$ 11,877
10% adverse change	(1,229)	(999)
20% adverse change	(2,367)	(1,912)
100 bps adverse change	(877)	(518)
200 bps adverse change	$ (1,693)	$ (1,001)
Weighted average
Servicing Assets at Fair Value [Line Items]
Prepayment rate assumption	12.60%	17.70%
Discount rate	9.50%	10.00%
Minimum
Servicing Assets at Fair Value [Line Items]
Prepayment rate assumption	7.00%	8.70%
Discount rate	9.50%	10.00%
Maximum
Servicing Assets at Fair Value [Line Items]
Prepayment rate assumption	77.60%	19.50%
Discount rate	10.50%	11.00%

Servicing Assets and Liabilit_7

Servicing Assets and Liabilities - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SBA/USDA loans
Schedule Of Servicing Asset [Line Items]
Loans serviced for others not included in balance sheet	$ 428,000	$ 402,000
Contractually specified servicing fees earned by United on servicing rights	3,900	3,770	$ 3,820
Residential mortgage servicing rights
Schedule Of Servicing Asset [Line Items]
Loans serviced for others not included in balance sheet	2,820,000	2,310,000
Contractually specified servicing fees earned by United on servicing rights	6,480	4,820	$ 3,670
Equipment financing loans
Schedule Of Servicing Asset [Line Items]
Loans serviced for others not included in balance sheet	78,800	45,500
Servicing liabilities	$ 675	$ 357

Time Deposits - Contractual mat

Time Deposits - Contractual maturities of time deposits (Details) $ in Thousands	Dec. 31, 2021USD ($)
Contractual maturities of time deposits
2022	$ 1,237,100
2023	142,305
2024	35,497
2025	21,479
2026	19,810
Thereafter	50,260
Total time deposits	$ 1,506,451

Time Deposits - Narrative (Deta

Time Deposits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deposits [Abstract]
Time deposits (excluding brokered time deposits) that met or exceeded FDIC insurance limit	$ 269	$ 317

Long-term Debt - Schedule of lo

Long-term Debt - Schedule of long-term debt (Details) - USD ($) $ in Thousands	12 Months Ended	29 Months Ended		64 Months Ended	67 Months Ended	71 Months Ended
	Dec. 31, 2021	Dec. 31, 2027	Dec. 31, 2022	Dec. 31, 2026	Dec. 31, 2030	Dec. 31, 2028	Dec. 31, 2020
Debt Instrument [Line Items]
Less net discount	$ (8,260)						$ (9,296)
Total long-term debt	247,360						326,956
Senior debentures
Debt Instrument [Line Items]
Long-term debt, gross	135,000						185,000
Senior debentures | 2022 senior debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 0						50,000
Interest Rate (percent)	5.00%
Senior debentures | 2022 senior debentures | LIBOR | Forecast
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			3.814%
Senior debentures | 2027 senior debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 35,000						35,000
Interest Rate (percent)	5.50%
Senior debentures | 2027 senior debentures | LIBOR | Forecast
Debt Instrument [Line Items]
Basis spread on variable rate (percent)		3.71%
Senior debentures | 2030 senior debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 100,000						100,000
Interest Rate (percent)	5.00%
Senior debentures | 2030 senior debentures | SOFR | Forecast
Debt Instrument [Line Items]
Basis spread on variable rate (percent)					4.87%
Subordinated debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 100,000						111,250
Subordinated debentures | 2026 subordinated debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 0						15,000
Interest Rate (percent)	5.875%
Subordinated debentures | 2026 subordinated debentures | LIBOR | Forecast
Debt Instrument [Line Items]
Basis spread on variable rate (percent)				4.70%
Subordinated debentures | 2028 subordinated debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 100,000						100,000
Interest Rate (percent)	4.50%
Subordinated debentures | 2028 subordinated debentures | LIBOR | Forecast
Debt Instrument [Line Items]
Basis spread on variable rate (percent)						2.12%
Subordinated debentures | 2025 subordinated debentures
Debt Instrument [Line Items]
Long-term debt, gross	$ 0						11,250
Interest Rate (percent)	6.25%
Trust preferred securities
Debt Instrument [Line Items]
Long-term debt, gross	$ 20,620						25,002
Trust preferred securities | Southern Bancorp Capital Trust I
Debt Instrument [Line Items]
Long-term debt, gross	$ 0						4,382
Trust preferred securities | Southern Bancorp Capital Trust I | Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.00%
Trust preferred securities | Tidelands Statutory Trust I
Debt Instrument [Line Items]
Long-term debt, gross	$ 8,248						8,248
Trust preferred securities | Tidelands Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.38%
Trust preferred securities | Four Oaks Statutory Trust I
Debt Instrument [Line Items]
Long-term debt, gross	$ 12,372						$ 12,372
Trust preferred securities | Four Oaks Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.35%

Operating Leases - ROU asset an

Operating Leases - ROU asset and operating lease liability (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
ROU asset	$ 29,421	$ 31,398
Operating lease liability	$ 31,072	$ 33,095
ROU asset, balance sheet line item	Other Assets	Other Assets
Operating lease liability, balance sheet line item	Other liabilities	Other liabilities

Operating Leases - Narrative (D

Operating Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
ROU assets resulting in net increase in operating lease liability	$ 4,490	$ 17,400
FinTrust and Aquesta
Lessee, Lease, Description [Line Items]
ROU assets resulting in net increase in operating lease liability	$ 2,870
Three Shores
Lessee, Lease, Description [Line Items]
ROU assets resulting in net increase in operating lease liability		$ 15,100

Operating Leases - Operating le

Operating Leases - Operating lease income and expense and other supplemental information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating lease income and expense
Operating lease cost	$ 8,186	$ 6,449	$ 5,067
Variable lease cost	1,066	757	449
Short-term lease cost	85	100	136
Total lease cost	9,337	7,306	5,652
Sublease income and rental income from owned properties under operating leases	$ 976	$ 1,022	$ 1,160
Operating lease, weighted average remaining lease term (in years)	5 years 4 months 24 days	5 years 8 months 26 days	5 years 3 months 29 days
Operating lease, weighted average discount rate (percent)	1.58%	1.79%	2.79%

Operating Leases - Future minim

Operating Leases - Future minimum lease payments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Future minimum lease payments
2022	$ 8,197
2023	8,080
2024	4,222
2025	2,933
2026	2,756
Thereafter	6,242
Total	32,430
Less discount	(1,358)
Present value of lease liability	$ 31,072	$ 33,095

Fair Value Measurements - Asset

Fair Value Measurements - Assets and liabilities measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets:
Debt securities available-for-sale	$ 4,496,824	$ 3,224,721
Mortgage loans held for sale	44,109	105,433
U.S. Treasuries
Assets:
Debt securities available-for-sale	217,520	128,072
U.S. Government agencies & GSEs
Assets:
Debt securities available-for-sale	187,032	152,972
State and political subdivisions
Assets:
Debt securities available-for-sale	275,844	274,472
Corporate bonds
Assets:
Debt securities available-for-sale	193,166	71,767
Asset-backed securities
Assets:
Debt securities available-for-sale	604,277	562,722
Recurring
Assets:
Equity securities with readily determinable fair values	1,302	1,687
Mortgage loans held for sale	44,109	105,433
Deferred compensation plan assets	11,769	9,584
Servicing rights for SBA/USDA loans	6,513	6,462
Residential mortgage servicing rights	25,161	16,216
Derivative financial instruments	42,480	86,666
Total assets	4,628,158	3,450,769
Liabilities:
Deferred compensation plan liability	11,795	9,590
Derivative financial instruments	25,145	29,003
Total liabilities	36,940	38,593
Recurring | U.S. Treasuries
Assets:
Debt securities available-for-sale	217,520	128,072
Recurring | U.S. Government agencies & GSEs
Assets:
Debt securities available-for-sale	187,032	152,972
Recurring | State and political subdivisions
Assets:
Debt securities available-for-sale	275,844	274,472
Recurring | Residential MBS
Assets:
Debt securities available-for-sale	2,145,134	1,485,585
Recurring | Commercial MBS
Assets:
Debt securities available-for-sale	873,851	549,131
Recurring | Corporate bonds
Assets:
Debt securities available-for-sale	193,166	71,767
Recurring | Asset-backed securities
Assets:
Debt securities available-for-sale	604,277	562,722
Recurring | Level 1
Assets:
Equity securities with readily determinable fair values	0	774
Mortgage loans held for sale	0	0
Deferred compensation plan assets	11,769	9,584
Servicing rights for SBA/USDA loans	0	0
Residential mortgage servicing rights	0	0
Derivative financial instruments	0	0
Total assets	229,289	138,430
Liabilities:
Deferred compensation plan liability	11,795	9,590
Derivative financial instruments	0	0
Total liabilities	11,795	9,590
Recurring | Level 1 | U.S. Treasuries
Assets:
Debt securities available-for-sale	217,520	128,072
Recurring | Level 1 | U.S. Government agencies & GSEs
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 1 | State and political subdivisions
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 1 | Residential MBS
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 1 | Commercial MBS
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 1 | Corporate bonds
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 1 | Asset-backed securities
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 2
Assets:
Equity securities with readily determinable fair values	1,302	913
Mortgage loans held for sale	44,109	105,433
Deferred compensation plan assets	0	0
Servicing rights for SBA/USDA loans	0	0
Residential mortgage servicing rights	0	0
Derivative financial instruments	35,722	75,887
Total assets	4,358,042	3,277,132
Liabilities:
Deferred compensation plan liability	0	0
Derivative financial instruments	20,097	26,595
Total liabilities	20,097	26,595
Recurring | Level 2 | U.S. Treasuries
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 2 | U.S. Government agencies & GSEs
Assets:
Debt securities available-for-sale	187,032	152,972
Recurring | Level 2 | State and political subdivisions
Assets:
Debt securities available-for-sale	275,844	274,472
Recurring | Level 2 | Residential MBS
Assets:
Debt securities available-for-sale	2,145,134	1,485,585
Recurring | Level 2 | Commercial MBS
Assets:
Debt securities available-for-sale	873,851	549,131
Recurring | Level 2 | Corporate bonds
Assets:
Debt securities available-for-sale	190,771	70,017
Recurring | Level 2 | Asset-backed securities
Assets:
Debt securities available-for-sale	604,277	562,722
Recurring | Level 3
Assets:
Equity securities with readily determinable fair values	0	0
Mortgage loans held for sale	0	0
Deferred compensation plan assets	0	0
Servicing rights for SBA/USDA loans	6,513	6,462
Residential mortgage servicing rights	25,161	16,216
Derivative financial instruments	6,758	10,779
Total assets	40,827	35,207
Liabilities:
Deferred compensation plan liability	0	0
Derivative financial instruments	5,048	2,408
Total liabilities	5,048	2,408
Recurring | Level 3 | U.S. Treasuries
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 3 | U.S. Government agencies & GSEs
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 3 | State and political subdivisions
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 3 | Residential MBS
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 3 | Commercial MBS
Assets:
Debt securities available-for-sale	0	0
Recurring | Level 3 | Corporate bonds
Assets:
Debt securities available-for-sale	2,395	1,750
Recurring | Level 3 | Asset-backed securities
Assets:
Debt securities available-for-sale	$ 0	$ 0

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation for measurements at fair value on a recurring basis using significant unobservable inputs (Details) - Recurring - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Asset
Assets:
Balance at beginning of period	$ 10,779	$ 7,238	$ 11,841
Transfers into Level 3	74	583
Additions	261	368
Sales and settlements		0	(1,135)
Fair value adjustments included in OCI	0	0	0
Fair value adjustments included in earnings	(4,356)	2,590	(3,468)
Balance at end of period	6,758	10,779	7,238
Corporate Bonds
Assets:
Balance at beginning of period	1,750	998	995
Transfers into Level 3	0	0
Additions	500	1,750
Sales and settlements		(1,000)	0
Fair value adjustments included in OCI	145	2	3
Fair value adjustments included in earnings	0	0	0
Balance at end of period	2,395	1,750	998
Derivative Liability
Liabilities:
Balance at beginning of period	2,408	8,559	15,732
Transfers into Level 3	0	0
Additions	170	0
Sales and settlements		0	(2,330)
Fair value adjustments included in OCI	0	0	0
Fair value adjustments included in earnings	2,470	(6,151)	(4,843)
Balance at end of period	$ 5,048	$ 2,408	$ 8,559

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative information about Level 3 measurements for fair value on a recurring basis (Details) - Recurring - Level 3	Dec. 31, 2021security	Dec. 31, 2020security
Derivative assets - mortgage | Pull through rate | Low
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, measurement input	0.459	0.656
Derivative assets - mortgage | Pull through rate | High
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, measurement input	1	1
Derivative assets - mortgage | Pull through rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, measurement input	0.872	0.839
Derivative assets - customer derivative positions | Estimated loss rate | Low
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, measurement input	0.334	1
Derivative assets - customer derivative positions | Estimated loss rate | High
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, measurement input	0.440	1
Derivative assets - customer derivative positions | Estimated loss rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, measurement input	0.360	1
Corporate bonds | Discount rate | Low
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds, measurement input	0.036
Corporate bonds | Discount rate | High
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds, measurement input	0.038
Corporate bonds | Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate bonds, measurement input	0.036

Fair Value Measurements - Fair

Fair Value Measurements - Fair value option (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Mortgage Loans Held for Sale
Outstanding principal balance	$ 42,581	$ 99,746
Fair value	44,109	105,433
Mortgage loan gains and other related fees	$ (4,159)	$ 3,815	$ 1,177

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets and liabilities measured at fair value on nonrecurring basis (Details) - Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 2,536	$ 29,404
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 2,536	$ 29,404

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair values for other financial instruments that are not measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets:
HTM debt securities	$ 1,148,804	$ 437,193
Carrying Amount
Assets:
HTM debt securities	1,156,098	420,361
Loans, net	11,657,814	11,233,805
Liabilities:
Deposits	18,241,179	15,232,358
Long-term debt	247,360	326,956
Fair Value
Assets:
HTM debt securities	1,148,804	437,193
Loans, net	11,607,821	11,209,717
Liabilities:
Deposits	18,239,934	15,232,274
Long-term debt	267,064	336,763
Fair Value | Level 1
Assets:
HTM debt securities	0	0
Loans, net	0	0
Liabilities:
Deposits	0	0
Long-term debt	0	0
Fair Value | Level 2
Assets:
HTM debt securities	1,148,804	437,193
Loans, net	0	0
Liabilities:
Deposits	18,239,934	15,232,274
Long-term debt	0	0
Fair Value | Level 3
Assets:
HTM debt securities	0	0
Loans, net	11,607,821	11,209,717
Liabilities:
Deposits	0	0
Long-term debt	$ 267,064	$ 336,763

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Maximum remaining maturity of financial instruments having no defined maturity	180 days

Common and Preferred Stock (Det

Common and Preferred Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Class of Stock [Line Items]
Common stock authorized (in shares)	200,000,000	150,000,000			200,000,000	150,000,000
Repurchase program authorized amount	$ 50,000,000			$ 50,000,000
Shares repurchased (in shares)	492,744	826,482	500,495
Repurchase program remaining authorization	$ 50,000,000
Shares issued in connection with DRIP (in shares)	10,081	38,107	62,629
Net proceeds from issuance of preferred stock	$ 0	$ 96,422,000	$ 0
Preferred stock carrying amount	96,422,000	96,422,000
Series I perpetual non-cumulative preferred stock
Class of Stock [Line Items]
Preferred stock issued		$ 100,000,000
Issuance of stock (in shares)		4,000
Preferred stock dividend rate (percent)		6.875%
Net proceeds from issuance of preferred stock		$ 96,400,000
Preferred stock redemption price (in dollars per share)		$ 25,000
Preferred stock carrying amount	$ 96,400,000	$ 96,400,000
Depositary share on Series I perpetual non-cumulative preferred stock
Class of Stock [Line Items]
Preferred stock redemption price (in dollars per share)		$ 25

Equity Compensation Plans - Res

Equity Compensation Plans - Restricted stock units and options outstanding activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Options, Shares
Beginning balance, outstanding (in shares)	0	1,500	47,139
Granted (in shares)	62,743	0	0
Exercised (in shares)	(27,283)	0	(13,000)
Expired (in shares)		(1,500)	(30,243)
Cancelled (in shares)	0	0	(2,396)
Ending balance, outstanding (in shares)	35,460	0	1,500
Exercisable (in shares)	35,460
Options, Weighted Average Exercise Price
Beginning balance, outstanding (in dollars per share)	$ 0	$ 27.95	$ 27.07
Granted (in dollars per share)	8.30	0	0
Exercised (in dollars per shares)	8.20	0	16.34
Expired (in dollars per share)		27.95	31.43
Cancelled (in dollars per share)	0	0	29.68
Ending balance, outstanding (in dollars per share)	8.38	$ 0	$ 27.95
Exercisable (in dollars per share)	$ 8.38
Outstanding, Weighted Average Remaining Term (in years)	2 years 3 days
Exercisable, Weighted Average Remaining Term (in years)	2 years 3 days
Exercised during period, Aggregate Intrinsic Value	$ 765
Outstanding, Aggregate Intrinsic Value	977
Exercisable, Aggregate Intrinsic Value	$ 977
Restricted Stock Units
Restricted Stock Units, Shares
Beginning balance, outstanding (in shares)	893,431	808,424	759,746
Granted (in shares)	302,701	446,512	315,827
Vested (in shares)	(330,598)	(324,697)	(216,138)
Expired (in shares)		0	0
Cancelled (in shares)	(57,060)	(36,808)	(51,011)
Ending balance, outstanding (in shares)	808,474	893,431	808,424
Vested (in shares)	0
Restricted Stock Units, Weighted Average Grant Date Fair Value
Beginning balance, outstanding (in dollars per share)	$ 23.75	$ 27.94	$ 27.66
Granted (in dollars per share)	30.34	19.15	26.74
Vested (in dollars per share)	26.13	26.42	25.38
Expired (in dollars per share)
Cancelled (in dollars per share)	25.15	25.73	27.18
Ending balance, outstanding (in dollars per share)	25.15	$ 23.75	$ 27.94
Vested (in dollars per share)	$ 0
Vested, Aggregate Intrinsic Value	$ 10,855
Outstanding, Aggregate Intrinsic Value	$ 29,057

Equity Compensation Plans - Nar

Equity Compensation Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period under plan	4 years
Exercisable period	10 years
Additional awards remaining available under plan (in shares)	600,106
Deferred income tax benefit related to compensation expense for awards	$ 1,670,000	$ 2,010,000	$ 2,390,000
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	0	0	0
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 6,070,000	$ 7,400,000	$ 8,980,000
Units outstanding (in shares)	808,474	893,431	808,424	759,746
Unrecognized compensation cost	$ 15,500,000
Weighted-average recognition period for unrecognized compensation cost	2 years 6 months
Restricted stock units | Merger-related and other charges
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to acceleration of vesting			$ 1,380,000
Compensation expense related to acquisition			740,000
Restricted stock units | Salaries and employee benefits expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense			6,860,000
Restricted stock units | Other operating expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 489,000	$ 484,000	$ 379,000
Performance-based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	174,713

Reclassifications Out of AOCI_2

Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains (losses), net	$ 83	$ 748	$ (1,021)
Investment securities interest revenue	578,794	557,996	552,706
Salaries and employee benefits expense	(241,443)	(224,060)	(196,440)
Other expense	(17,386)	(15,301)	(15,092)
Deposit interest expense	(14,845)	(41,772)	(66,856)
Long-term debt interest expense	(14,912)	(14,434)	(12,921)
Merger-related and other	(13,970)	(7,018)	(6,907)
Total before tax	347,763	209,445	238,712
Income tax benefit	(77,962)	(45,356)	(52,991)
Net income	269,801	164,089	185,721
Reclassifications Out of AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(1,100)	(899)	(2,997)
Reclassifications Out of AOCI | Realized gains (losses) on AFS securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains (losses), net	83	748	(1,021)
Income tax benefit	46	(191)	247
Net income	129	557	(774)
Reclassifications Out of AOCI | Amortization of losses included in net income on AFS securities transferred to HTM
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities interest revenue	0	(723)	(383)
Income tax benefit	0	173	92
Net income	0	(550)	(291)
Reclassifications Out of AOCI | Reclassifications related to derivative financial instruments accounted for as cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense	0	0	(235)
Deposit interest expense	0	0	(102)
Long-term debt interest expense	(608)	(359)	0
Total before tax	(608)	(359)	(337)
Income tax benefit	156	91	86
Net income	(452)	(268)	(251)
Reclassifications Out of AOCI | Reclassifications related to defined benefit pension plan activity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(1,044)	(857)	(2,257)
Income tax benefit	267	219	576
Net income	(777)	(638)	(1,681)
Reclassifications Out of AOCI | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits expense	(469)	(531)	(640)
Reclassifications Out of AOCI | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense	(575)	(326)	(59)
Reclassifications Out of AOCI | Termination of Funded Plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Merger-related and other	$ 0	$ 0	$ (1,558)

Earnings Per Share - Computatio

Earnings Per Share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Computation of basic and diluted earnings per share
Net income	$ 269,801	$ 164,089	$ 185,721
Earnings allocated to participating securities	(1,657)	(1,287)	(1,375)
Dividends on preferred stock	(6,875)	(3,533)	0
Net income available to common shareholders, basic	261,269	159,269	184,346
Net income available to common shareholders, diluted	$ 261,269	$ 159,269	$ 184,346
Net income per common share:
Basic (in dollars per share)	$ 2.97	$ 1.91	$ 2.31
Diluted (in dollars per share)	$ 2.97	$ 1.91	$ 2.31
Weighted average common shares:
Basic (in shares)	87,940	83,184	79,700
Effect of dilutive securities:
Diluted (in shares)	88,097	83,248	79,708
Stock options
Effect of dilutive securities:
Dilutive securities (in shares)	9	0	1
Restricted stock units
Effect of dilutive securities:
Dilutive securities (in shares)	148	64	7

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Antidilutive securities excluded from computation (in shares)	0	0
Weighted average exercise price of stock options (in dollars per share)	$ 8.20	$ 0	$ 16.34
Stock options
Class of Stock [Line Items]
Antidilutive securities excluded from computation (in shares)			1,000
Restricted stock units
Class of Stock [Line Items]
Antidilutive securities excluded from computation (in shares)			183,168
Weighted average exercise price of stock options (in dollars per share)			$ 30.45

Income Taxes - Income tax expen

Income Taxes - Income tax expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current	$ 57,175	$ 42,688	$ 38,082
Deferred	20,787	2,668	14,909
Total income tax expense	$ 77,962	$ 45,356	$ 52,991

Income Taxes - Differences betw

Income Taxes - Differences between provision for income taxes and amount computed as statutory rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Differences between the provision for income taxes and statutory federal income tax rate
Income tax expense on pretax income at statutory rates	$ 73,030	$ 43,983	$ 50,130
Add (deduct):
State taxes, net of federal benefit	9,188	5,928	7,168
BOLI earnings	(745)	(1,052)	(1,127)
Adjustment to reserve for uncertain tax positions	153	(1,212)	84
Tax-exempt interest revenue	(2,520)	(2,169)	(1,827)
Equity compensation	(891)	(174)	(375)
Transaction costs	117	217	16
Tax credit investments	(598)	(930)	(464)
Other	228	765	(614)
Total income tax expense	$ 77,962	$ 45,356	$ 52,991

Income Taxes - Deferred taxes (

Income Taxes - Deferred taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
DTAs:
ACL	$ 24,349	$ 33,213
Net operating loss carryforwards	16,656	22,277
Deferred compensation	11,011	10,012
Loan purchase accounting adjustments	4,227	8,567
Nonqualified share based compensation	1,374	1,833
Accrued expenses	7,936	6,865
Unamortized pension actuarial losses and prior service cost	1,442	1,981
Unrealized losses on AFS securities	5,808	0
Deferred gains on SBA/USDA loan sales	2,217	2,060
Lease liability	7,501	8,055
Other	1,107	2,062
Total DTAs	83,628	96,925
DTLs:
Unrealized gains on AFS securities	0	17,439
Unrealized gains on cash flow hedges	1,189	54
Acquired intangible assets	2,412	2,576
Premises and equipment	5,179	4,241
Loan origination costs	6,466	4,857
True tax leases	5,984	7,846
Servicing assets	6,779	4,816
Derivatives	1,309	2,250
ROU asset	7,102	7,642
Securities purchase accounting adjustments	2,644	3,146
Uncertain tax positions	1,945	1,813
Other	386	230
Total DTLs	41,395	56,910
Less valuation allowance	911	1,604
Net DTA	$ 41,322	$ 38,411

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of the beginning and ending unrecognized tax benefit
Balance at beginning of year	$ 2,163	$ 3,370	$ 3,264
Additions based on tax positions related to the current year	634	421	481
Decreases resulting from a lapse in the applicable statute of limitations	(441)	(1,628)	(375)
Balance at end of year	$ 2,356	$ 2,163	$ 3,370

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Tax Credit Carryforward [Line Items]
Increase in net DTA	$ 2,120,000
Valuation allowance	911,000	$ 1,604,000
Net DTA	41,322,000	38,411,000
Tax benefit related to uncertain tax positions that increases income from continuing operations	1,860,000
Penalties and interest related to income taxes	0	0	$ 0
Accrued penalties and interest	0	$ 0
Begin to expire in 2025 | State
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	32,900,000
Begin to expire in 2031 | State
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	51,100,000
Begin to expire in 2027 | Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	51,200,000
Begin to expire in 2022 | State
Tax Credit Carryforward [Line Items]
State tax credits	$ 3,410,000

Benefit Plans - Narrative (Deta

Benefit Plans - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Employer match of employee contributions (percent)		100.00%
Employer matching contribution maximum percent of employee's eligible compensation (percent)		5.00%
Service period to receive matching contribution		1 year
Vesting period of benefits				3 years
Compensation expense related to 401(k) Plan		$ 7,310,000	$ 6,160,000	$ 5,300,000
Common stock issuable under the deferred compensation plan (shares)		595,705	600,834
Unrecognized losses previously in accumulated other income (loss) recognized upon fund liquidation		$ 0	$ 0	$ 1,558,000
Shares issued through ESPP (in shares)		6,676	34,423	20,928
Executive officers, certain key employees, and board of directors
Defined Benefit Plan Disclosure [Line Items]
Matching contributions to deferred compensation plan		$ 73,000	$ 49,000	$ 162,000
Discretionary contributions to deferred compensation plan		0	0	0
Funded plan | Defined benefit plan
Defined Benefit Plan Disclosure [Line Items]
United contributions to the plan	$ 4,900,000
Unrecognized losses previously in accumulated other income (loss) recognized upon fund liquidation				1,560,000
Pension plan settlement expense				1,380,000
Total settlement loss upon plan termination				$ 2,940,000
Modified Retirement Plan | Unfunded plan
Defined Benefit Plan Disclosure [Line Items]
United contributions to the plan		$ 1,107,000	$ 1,193,000

Benefit Plans - Weighted-averag

Benefit Plans - Weighted-average assumptions to determine pension benefit obligation (Details) - Modified Retirement Plan - Unfunded plan	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Discount rate for disclosures (percent)	2.90%	2.55%
Discount rate for net periodic benefit cost (percent)	2.55%	3.25%

Benefit Plans - Changes in obli

Benefit Plans - Changes in obligations and plan assets (Details) - Modified Retirement Plan - Unfunded plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated benefit obligation:
Accumulated benefit obligation - beginning of year	$ 27,099	$ 25,105
Service cost	659	588	$ 392
Interest cost	676	795	931
Actuarial (gains) losses	(1,066)	1,804
Benefits paid	(1,107)	(1,193)
Accumulated benefit obligation - end of year	26,261	27,099	25,105
Change in plan assets, at fair value:
Beginning plan assets	0	0
Employer contribution	1,107	1,193
Benefits paid	(1,107)	(1,193)
Plan assets - end of year	0	0	$ 0
Funded status - end of year (plan assets less benefit obligations)	$ (26,261)	$ (27,099)

Benefit Plans - Components of n

Benefit Plans - Components of net periodic benefit cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Modified Retirement Plan | Unfunded plan
Components of net periodic benefit cost
Service cost	$ 659	$ 588	$ 392
Interest cost	676	795	931
Expected return on plan assets	0	0	0
Amortization of prior service cost	469	531	635
Amortization of net actuarial losses	576	326	59
Net periodic benefit cost	$ 2,380	$ 2,240	2,017
Funded Plan | Funded plan
Components of net periodic benefit cost
Service cost			0
Interest cost			166
Expected return on plan assets			(106)
Amortization of prior service cost			0
Amortization of net actuarial losses			0
Net periodic benefit cost			$ 60

Benefit Plans - Estimated futur

Benefit Plans - Estimated future benefit payments expected to be paid (Details) - Modified Retirement Plan - Unfunded plan $ in Thousands	Dec. 31, 2021USD ($)
Defined Benefit Plan Disclosure [Line Items]
2022	$ 1,191
2023	1,185
2024	1,179
2025	1,192
2026	1,213
2027-2031	$ 8,276

Regulatory Matters - Regulatory

Regulatory Matters - Regulatory capital ratios and minimum amounts required (Details) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Risk-based ratios:
CET1 capital, Minimum	0.045
CET1 capital, Well Capitalized	0.065
CET1 capital	0.1246	0.1231
Tier 1 capital, Minimum	0.060
Tier 1 capital, Well Capitalized	0.080
Tier 1 capital	0.1317	0.1310
Total capital, Minimum	0.080
Total capital, Well Capitalized	0.100
Total capital	0.1465	0.1515
Tier 1 leverage ratio, Minimum	0.040
Tier 1 leverage ratio, Well Capitalized	0.050
Tier 1 leverage ratio	0.0875	0.0928
CET1 capital	$ 1,688,176	$ 1,506,750
Tier 1 capital	1,784,598	1,603,172
Total capital	1,984,376	1,854,368
RWAs	13,548,534	12,240,440
Average total assets	$ 20,402,842	$ 17,276,853
United Community Bank
Risk-based ratios:
CET1 capital	0.1287	0.1331
Tier 1 capital	0.1287	0.1331
Total capital	0.1346	0.1428
Tier 1 leverage ratio	0.0853	0.0942
CET1 capital	$ 1,738,557	$ 1,625,292
Tier 1 capital	1,738,557	1,625,292
Total capital	1,818,335	1,743,045
RWAs	13,512,405	12,207,940
Average total assets	$ 20,377,319	$ 17,246,878

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Regulatory Capital Requirements Under Banking Regulations [Abstract]
Cash dividend from Bank paid to Holding Company	$ 217	$ 150

Commitments and Contingencies -

Commitments and Contingencies - Contractual amount of off-balance sheet instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments whose contract amounts represent credit risk	$ 3,591,975	$ 3,052,657
Letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments whose contract amounts represent credit risk	$ 29,312	$ 31,748

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) $ in Millions	Dec. 31, 2021USD ($)
Other Commitments [Line Items]
Investment in limited partnerships	$ 52.7
Commitment For Additional Fund	10
United Community Bank
Other Commitments [Line Items]
Commitment For Additional Fund	$ 13.7

Condensed Financial Statement_3

Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Other assets	$ 211,199	$ 226,405
Total assets	20,946,771	17,794,374
LIABILITIES AND SHAREHOLDERS’ EQUITY
Long-term debt	247,360	326,956
Total liabilities	18,724,526	15,786,844
Shareholders’ equity	2,222,245	2,007,530	$ 1,635,692	$ 1,457,554
Total liabilities and shareholders’ equity	20,946,771	17,794,374
Holding Company
ASSETS
Cash and cash equivalents	298,316	289,243
Investment in Bank	2,150,683	2,028,965
Investment in other subsidiaries	23,194	752
Other assets	46,432	34,661
Total assets	2,518,625	2,353,621
LIABILITIES AND SHAREHOLDERS’ EQUITY
Long-term debt	247,360	311,956
Other liabilities	49,020	34,135
Total liabilities	296,380	346,091
Shareholders’ equity	2,222,245	2,007,530
Total liabilities and shareholders’ equity	$ 2,518,625	$ 2,353,621

Condensed Financial Statement_4

Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) - Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Operations
Dividends from Bank	$ 217,000	$ 150,000
Interest expense	29,760	56,237	$ 83,312
Income tax benefit	(77,962)	(45,356)	(52,991)
Net income	269,801	164,089	185,721
Holding Company
Statement of Operations
Dividends from Bank	217,000	150,000	0
Dividends from other subsidiaries	0	0	4,651
Shared service fees from subsidiaries	12,402	13,020	14,721
Other	3,167	1,436	1,468
Total income	232,569	164,456	20,840
Interest expense	14,324	13,994	11,573
Other expense	16,417	16,473	18,965
Total expenses	30,741	30,467	30,538
Income tax benefit	6,908	2,681	8,711
Income (loss) before equity in undistributed earnings of subsidiaries	208,736	136,670	(987)
Equity in undistributed earnings of subsidiaries	61,065	27,419	186,708
Net income	$ 269,801	$ 164,089	$ 185,721

Condensed Financial Statement_5

Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 269,801	$ 164,089	$ 185,721
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	6,554	7,887	9,360
Changes in assets and liabilities:
Other assets	53,416	(20,139)	(45,789)
Net cash provided by operating activities	359,320	158,681	153,933
Investing activities:
Net cash (paid) received for acquisition	103,065	195,699	(19,545)
Purchases of premises and equipment	(26,483)	(18,462)	(20,944)
Proceeds from sale of premises and equipment	4,247	903	6,595
Other investing inflows	767	5,241	1,916
Other investing outflows	(610)	0	0
Net cash (used in) provided by investing activities	(1,806,403)	(1,580,563)	163,218
Financing activities:
Proceeds from issuance of Series I preferred stock, net of issuance costs	0	96,422	0
Cash paid for shares withheld to cover payroll taxes related to equity instruments	(3,182)	(3,119)	(1,686)
Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans	506	1,317	2,193
Proceeds from exercise of options and warrants	231	0	212
Repurchase of common stock	(15,101)	(20,782)	(13,020)
Cash dividends on preferred stock	(6,876)	(3,533)	0
Cash dividends on common stock	(66,914)	(58,912)	(53,044)
Net cash (used in) provided by financing activities	2,156,974	2,515,295	(129,210)
Net change in cash and cash equivalents	709,891	1,093,413	187,941
Cash and cash equivalents at beginning of year	1,608,619	515,206	327,265
Cash and cash equivalents at end of year	2,318,510	1,608,619	515,206
Holding Company
Operating activities:
Net income	269,801	164,089	185,721
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings of the subsidiaries	(61,065)	(27,419)	(186,708)
Stock-based compensation	6,554	7,887	9,360
Changes in assets and liabilities:
Other assets	(7,800)	(3,662)	(3,022)
Other liabilities	6,353	5,261	2,080
Net cash provided by operating activities	213,843	146,156	7,431
Investing activities:
Net cash (paid) received for acquisition	(47,785)	3,397	(52,093)
Purchases of premises and equipment	(30)	0	0
Purchases of debt securities available-for-sale and equity securities	(1,500)	(2,750)	(3,000)
Proceeds from sales and maturities of debt securities available-for-sale and equity securities	1,253	0	83
Proceeds from sale of premises and equipment	728	0	0
Other investing inflows	132	0	0
Other investing outflows	(600)	0	0
Net cash (used in) provided by investing activities	(47,802)	647	(55,010)
Financing activities:
Repayment of long-term debt	(65,632)	0	(250)
Proceeds from issuance of long-term debt, net of issuance costs	0	98,552	0
Proceeds from issuance of Series I preferred stock, net of issuance costs	0	96,422	0
Cash paid for shares withheld to cover payroll taxes related to equity instruments	(3,182)	(3,119)	(1,686)
Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans	506	1,317	2,193
Proceeds from exercise of options and warrants	231	0	212
Repurchase of common stock	(15,101)	(20,782)	(13,020)
Cash dividends on preferred stock	6,876	3,533	0
Cash dividends on common stock	(66,914)	(58,912)	(53,044)
Net cash (used in) provided by financing activities	(156,968)	109,945	(65,595)
Net change in cash and cash equivalents	9,073	256,748	(113,174)
Cash and cash equivalents at beginning of year	289,243	32,495	145,669
Cash and cash equivalents at end of year	$ 298,316	$ 289,243	$ 32,495

Subsequent Events (Details)

Subsequent Events (Details) $ / shares in Units, $ in Thousands, shares in Millions	Feb. 17, 2022$ / shares	Feb. 25, 2022USD ($)shares	Dec. 31, 2021USD ($)bank_branch$ / shares	Dec. 31, 2020USD ($)$ / shares	Dec. 31, 2019$ / shares
Subsequent Event [Line Items]
Cash dividend declared per common share (in dollars per share) | $ / shares			$ 0.78	$ 0.72	$ 0.68
Assets			$ 20,946,771	$ 17,794,374
Deposits			$ 18,241,179	$ 15,232,358
Reliant
Subsequent Event [Line Items]
Number of banking offices | bank_branch			25
Assets			$ 3,000,000
Total loans			2,380,000
Deposits			$ 2,500,000
Subsequent event | Common stock, par value $1 per share
Subsequent Event [Line Items]
Dividend date declared	Feb. 17, 2022
Cash dividend declared per common share (in dollars per share) | $ / shares	$ 0.21
Dividend payable date	Apr. 5, 2022
Dividend date of record	Mar. 15, 2022
Subsequent event | Series I perpetual non-cumulative preferred stock
Subsequent Event [Line Items]
Dividend date declared	Feb. 17, 2022
Preferred stock dividend per preferred share (in dollars per share) | $ / shares	$ 429.6875
Dividend payable date	Mar. 15, 2022
Dividend date of record	Feb. 28, 2022
Subsequent event | Depositary share on Series I perpetual non-cumulative preferred stock
Subsequent Event [Line Items]
Preferred stock dividend per preferred share (in dollars per share) | $ / shares	$ 0.4296875
Subsequent event | Reliant
Subsequent Event [Line Items]
Total fair value of consideration transferred		$ 597,000
Common stock issued		$ 596,000
Shares issued in acquisition (in shares) | shares		16.6
Converted stock options		$ 795
Cash		$ 624